405eb0e5b8
There are a mix of function prototypes with and without extern in the kernel sources. Standardize on not using extern for function prototypes. Function prototypes don't need to be written with extern. extern is assumed by the compiler. Its use is as unnecessary as using auto to declare automatic/local variables in a block. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
167 lines
4.4 KiB
C
167 lines
4.4 KiB
C
/*
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* softing common interfaces
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*
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* by Kurt Van Dijck, 2008-2010
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*/
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#include <linux/atomic.h>
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#include <linux/netdevice.h>
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#include <linux/ktime.h>
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#include <linux/mutex.h>
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#include <linux/spinlock.h>
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#include <linux/can.h>
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#include <linux/can/dev.h>
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#include "softing_platform.h"
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struct softing;
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struct softing_priv {
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struct can_priv can; /* must be the first member! */
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struct net_device *netdev;
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struct softing *card;
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struct {
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int pending;
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/* variables which hold the circular buffer */
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int echo_put;
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int echo_get;
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} tx;
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struct can_bittiming_const btr_const;
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int index;
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uint8_t output;
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uint16_t chip;
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};
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#define netdev2softing(netdev) ((struct softing_priv *)netdev_priv(netdev))
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struct softing {
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const struct softing_platform_data *pdat;
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struct platform_device *pdev;
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struct net_device *net[2];
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spinlock_t spin; /* protect this structure & DPRAM access */
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ktime_t ts_ref;
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ktime_t ts_overflow; /* timestamp overflow value, in ktime */
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struct {
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/* indication of firmware status */
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int up;
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/* protection of the 'up' variable */
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struct mutex lock;
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} fw;
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struct {
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int nr;
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int requested;
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int svc_count;
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unsigned int dpram_position;
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} irq;
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struct {
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int pending;
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int last_bus;
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/*
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* keep the bus that last tx'd a message,
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* in order to let every netdev queue resume
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*/
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} tx;
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__iomem uint8_t *dpram;
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unsigned long dpram_phys;
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unsigned long dpram_size;
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struct {
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uint16_t fw_version, hw_version, license, serial;
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uint16_t chip[2];
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unsigned int freq; /* remote cpu's operating frequency */
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} id;
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};
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int softing_default_output(struct net_device *netdev);
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ktime_t softing_raw2ktime(struct softing *card, u32 raw);
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int softing_chip_poweron(struct softing *card);
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int softing_bootloader_command(struct softing *card, int16_t cmd,
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const char *msg);
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/* Load firmware after reset */
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int softing_load_fw(const char *file, struct softing *card,
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__iomem uint8_t *virt, unsigned int size, int offset);
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/* Load final application firmware after bootloader */
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int softing_load_app_fw(const char *file, struct softing *card);
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/*
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* enable or disable irq
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* only called with fw.lock locked
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*/
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int softing_enable_irq(struct softing *card, int enable);
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/* start/stop 1 bus on card */
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int softing_startstop(struct net_device *netdev, int up);
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/* netif_rx() */
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int softing_netdev_rx(struct net_device *netdev, const struct can_frame *msg,
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ktime_t ktime);
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/* SOFTING DPRAM mappings */
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#define DPRAM_RX 0x0000
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#define DPRAM_RX_SIZE 32
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#define DPRAM_RX_CNT 16
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#define DPRAM_RX_RD 0x0201 /* uint8_t */
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#define DPRAM_RX_WR 0x0205 /* uint8_t */
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#define DPRAM_RX_LOST 0x0207 /* uint8_t */
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#define DPRAM_FCT_PARAM 0x0300 /* int16_t [20] */
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#define DPRAM_FCT_RESULT 0x0328 /* int16_t */
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#define DPRAM_FCT_HOST 0x032b /* uint16_t */
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#define DPRAM_INFO_BUSSTATE 0x0331 /* uint16_t */
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#define DPRAM_INFO_BUSSTATE2 0x0335 /* uint16_t */
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#define DPRAM_INFO_ERRSTATE 0x0339 /* uint16_t */
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#define DPRAM_INFO_ERRSTATE2 0x033d /* uint16_t */
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#define DPRAM_RESET 0x0341 /* uint16_t */
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#define DPRAM_CLR_RECV_FIFO 0x0345 /* uint16_t */
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#define DPRAM_RESET_TIME 0x034d /* uint16_t */
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#define DPRAM_TIME 0x0350 /* uint64_t */
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#define DPRAM_WR_START 0x0358 /* uint8_t */
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#define DPRAM_WR_END 0x0359 /* uint8_t */
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#define DPRAM_RESET_RX_FIFO 0x0361 /* uint16_t */
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#define DPRAM_RESET_TX_FIFO 0x0364 /* uint8_t */
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#define DPRAM_READ_FIFO_LEVEL 0x0365 /* uint8_t */
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#define DPRAM_RX_FIFO_LEVEL 0x0366 /* uint16_t */
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#define DPRAM_TX_FIFO_LEVEL 0x0366 /* uint16_t */
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#define DPRAM_TX 0x0400 /* uint16_t */
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#define DPRAM_TX_SIZE 16
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#define DPRAM_TX_CNT 32
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#define DPRAM_TX_RD 0x0601 /* uint8_t */
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#define DPRAM_TX_WR 0x0605 /* uint8_t */
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#define DPRAM_COMMAND 0x07e0 /* uint16_t */
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#define DPRAM_RECEIPT 0x07f0 /* uint16_t */
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#define DPRAM_IRQ_TOHOST 0x07fe /* uint8_t */
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#define DPRAM_IRQ_TOCARD 0x07ff /* uint8_t */
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#define DPRAM_V2_RESET 0x0e00 /* uint8_t */
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#define DPRAM_V2_IRQ_TOHOST 0x0e02 /* uint8_t */
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#define TXMAX (DPRAM_TX_CNT - 1)
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/* DPRAM return codes */
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#define RES_NONE 0
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#define RES_OK 1
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#define RES_NOK 2
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#define RES_UNKNOWN 3
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/* DPRAM flags */
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#define CMD_TX 0x01
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#define CMD_ACK 0x02
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#define CMD_XTD 0x04
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#define CMD_RTR 0x08
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#define CMD_ERR 0x10
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#define CMD_BUS2 0x80
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/* returned fifo entry bus state masks */
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#define SF_MASK_BUSOFF 0x80
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#define SF_MASK_EPASSIVE 0x60
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/* bus states */
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#define STATE_BUSOFF 2
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#define STATE_EPASSIVE 1
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#define STATE_EACTIVE 0
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