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/*
* softing common interfaces
*
* by Kurt Van Dijck, 06-2008
*/
#include <linux/interrupt.h>
#include <linux/netdevice.h>
#include <linux/can.h>
#include <linux/can/dev.h>
struct softing;
struct sofing_desc;
/* special attribute, so we should not rely on the ->priv pointers
* before knowing how to interpret these
*/
struct softing_attribute;
struct softing_priv {
struct can_priv can; /* must be the first member! */
struct net_device *netdev;
struct softing *card;
struct {
int pending;
/* variables wich hold the circular buffer */
int echo_put;
int echo_get;
} tx;
struct can_bittiming_const btr_const;
int index;
u8 output;
u16 chip;
struct attribute_group sysfs;
};
#define netdev2softing(netdev) ((struct softing_priv *)netdev_priv(netdev))
/* the 'all cards have the same' fields definition */
extern const struct can_bittiming_const softing_btr_const;
struct softing_desc {
unsigned int manf;
unsigned int prod;
/* generation
* 1st with NEC or SJA1000
* 8bit, exclusive interrupt, ...
* 2nd only SJA11000
* 16bit, shared interrupt
*/
int generation;
unsigned int freq; /*crystal in MHz */
unsigned int max_brp;
unsigned int max_sjw;
unsigned long dpram_size;
char name[32];
struct {
unsigned long offs;
unsigned long addr;
char fw[32];
} boot, load, app;
};
struct softing {
int nbus;
struct softing_priv *bus[2];
spinlock_t spin; /* protect this structure & DPRAM access */
struct {
/* indication of firmware status */
int up;
/* protection of the 'up' variable */
struct mutex lock;
} fw;
struct {
int nr;
int requested;
struct tasklet_struct bh;
int svc_count;
} irq;
struct {
int pending;
int last_bus;
/* keep the bus that last tx'd a message,
* in order to let every netdev queue resume
*/
} tx;
struct {
unsigned long phys;
unsigned long size;
unsigned char *virt;
unsigned char *end;
struct softing_fct *fct;
struct softing_info *info;
struct softing_rx *rx;
struct softing_tx *tx;
struct softing_irq *irq;
unsigned short *command;
unsigned short *receipt;
} dpram;
struct {
unsigned short manf;
unsigned short prod;
u32 serial, fw, hw, lic;
u16 chip [2];
u32 freq;
const char *name;
} id;
const struct softing_desc *desc;
struct {
int (*reset) (struct softing *, int);
int (*enable_irq)(struct softing *, int);
} fn;
struct device *dev;
/* sysfs */
struct attribute_group sysfs;
struct softing_attribute *attr;
struct attribute **grp;
};
extern int mk_softing(struct softing *);
/* fields that must be set already are :
* ncan
* id.manf
* id.prod
* fn.reset
* fn.enable_irq
*/
extern void rm_softing(struct softing *);
/* usefull functions during operation */
extern const struct softing_desc *
softing_lookup_desc(unsigned int manf, unsigned int prod);
extern int softing_default_output(struct softing *card
, struct softing_priv *priv);
extern u32 softing_time2usec(struct softing *card, u32 raw);
extern int softing_fct_cmd(struct softing *card
, int cmd, int vector, const char *msg);
extern int softing_bootloader_command(struct softing *card
, int command, const char *msg);
/* Load firmware after reset */
extern int softing_load_fw(const char *file, struct softing *card,
unsigned char *virt, unsigned int size, int offset);
/* Load final application firmware after bootloader */
extern int softing_load_app_fw(const char *file, struct softing *card);
extern int softing_reset_chip(struct softing *card);
/* enable or disable irq
* only called with fw.lock locked
*/
extern int softing_card_irq(struct softing *card, int enable);
/* called when tx queue is flushed */
extern void softing_flush_echo_skb(struct softing_priv *priv);
/* reinitaliase the card, apply -1 for bus[01] for 'no change' */
extern int softing_reinit(struct softing *card, int bus0, int bus1);
/* SOFTING DPRAM mappings */
struct softing_rx {
u8 fifo[16][32];
u8 dummy1;
u16 rd;
u16 dummy2;
u16 wr;
u16 dummy3;
u16 lost_msg;
} __attribute__((packed));
#define TXMAX 31
struct softing_tx {
u8 fifo[32][16];
u8 dummy1;
u16 rd;
u16 dummy2;
u16 wr;
u8 dummy3;
} __attribute__((packed));
struct softing_irq {
u8 to_host;
u8 to_card;
} __attribute__((packed));
struct softing_fct {
s16 param[20]; /* 0 is index */
s16 returned;
u8 dummy;
u16 host_access;
} __attribute__((packed));
struct softing_info {
u8 dummy1;
u16 bus_state;
u16 dummy2;
u16 bus_state2;
u16 dummy3;
u16 error_state;
u16 dummy4;
u16 error_state2;
u16 dummy5;
u16 reset;
u16 dummy6;
u16 clear_rcv_fifo;
u16 dummy7;
u16 dummyxx;
u16 dummy8;
u16 time_reset;
u8 dummy9;
u32 time;
u32 time_wrap;
u8 wr_start;
u8 wr_end;
u8 dummy10;
u16 dummy12;
u16 dummy12x;
u16 dummy13;
u16 reset_rcv_fifo;
u8 dummy14;
u8 reset_xmt_fifo;
u8 read_fifo_levels;
u16 rcv_fifo_level;
u16 xmt_fifo_level;
} __attribute__((packed));
/* DPRAM return codes */
#define RES_NONE 0
#define RES_OK 1
#define RES_NOK 2
#define RES_UNKNOWN 3
/* DPRAM flags */
#define CMD_TX 0x01
#define CMD_ACK 0x02
#define CMD_XTD 0x04
#define CMD_RTR 0x08
#define CMD_ERR 0x10
#define CMD_BUS2 0x80
/* debug */
extern int softing_debug;
#define mod_alert(fmt,arg...) { \
if (softing_debug >= 0) \
printk(KERN_ALERT "[%s] %s:" fmt "\n" \
, THIS_MODULE->name \
, __func__ \
, ##arg); \
}
#define mod_info(fmt,arg...) { \
if (softing_debug >= 1) \
printk(KERN_INFO "[%s] %s:" fmt "\n"\
, THIS_MODULE->name \
, __func__ \
, ##arg); \
}
#define mod_trace(fmt,arg...) { \
if (softing_debug >= 2) \
printk(KERN_DEBUG "[%s] %s:" fmt "\n" \
, THIS_MODULE->name \
, __func__ \
, ##arg); \
}
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