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1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * softing common interfaces4 *5 * by Kurt Van Dijck, 2008-20106 */7 8#include <linux/atomic.h>9#include <linux/netdevice.h>10#include <linux/ktime.h>11#include <linux/mutex.h>12#include <linux/spinlock.h>13#include <linux/can.h>14#include <linux/can/dev.h>15 16#include "softing_platform.h"17 18struct softing;19 20struct softing_priv {21 struct can_priv can; /* must be the first member! */22 struct net_device *netdev;23 struct softing *card;24 struct {25 int pending;26 /* variables which hold the circular buffer */27 int echo_put;28 int echo_get;29 } tx;30 struct can_bittiming_const btr_const;31 int index;32 uint8_t output;33 uint16_t chip;34};35#define netdev2softing(netdev) ((struct softing_priv *)netdev_priv(netdev))36 37struct softing {38 const struct softing_platform_data *pdat;39 struct platform_device *pdev;40 struct net_device *net[2];41 spinlock_t spin; /* protect this structure & DPRAM access */42 ktime_t ts_ref;43 ktime_t ts_overflow; /* timestamp overflow value, in ktime */44 45 struct {46 /* indication of firmware status */47 int up;48 /* protection of the 'up' variable */49 struct mutex lock;50 } fw;51 struct {52 int nr;53 int requested;54 int svc_count;55 unsigned int dpram_position;56 } irq;57 struct {58 int pending;59 int last_bus;60 /*61 * keep the bus that last tx'd a message,62 * in order to let every netdev queue resume63 */64 } tx;65 __iomem uint8_t *dpram;66 unsigned long dpram_phys;67 unsigned long dpram_size;68 struct {69 uint16_t fw_version, hw_version, license, serial;70 uint16_t chip[2];71 unsigned int freq; /* remote cpu's operating frequency */72 } id;73};74 75int softing_default_output(struct net_device *netdev);76 77ktime_t softing_raw2ktime(struct softing *card, u32 raw);78 79int softing_chip_poweron(struct softing *card);80 81int softing_bootloader_command(struct softing *card, int16_t cmd,82 const char *msg);83 84/* Load firmware after reset */85int softing_load_fw(const char *file, struct softing *card,86 __iomem uint8_t *virt, unsigned int size, int offset);87 88/* Load final application firmware after bootloader */89int softing_load_app_fw(const char *file, struct softing *card);90 91/*92 * enable or disable irq93 * only called with fw.lock locked94 */95int softing_enable_irq(struct softing *card, int enable);96 97/* start/stop 1 bus on card */98int softing_startstop(struct net_device *netdev, int up);99 100/* netif_rx() */101int softing_netdev_rx(struct net_device *netdev, const struct can_frame *msg,102 ktime_t ktime);103 104/* SOFTING DPRAM mappings */105#define DPRAM_RX 0x0000106 #define DPRAM_RX_SIZE 32107 #define DPRAM_RX_CNT 16108#define DPRAM_RX_RD 0x0201 /* uint8_t */109#define DPRAM_RX_WR 0x0205 /* uint8_t */110#define DPRAM_RX_LOST 0x0207 /* uint8_t */111 112#define DPRAM_FCT_PARAM 0x0300 /* int16_t [20] */113#define DPRAM_FCT_RESULT 0x0328 /* int16_t */114#define DPRAM_FCT_HOST 0x032b /* uint16_t */115 116#define DPRAM_INFO_BUSSTATE 0x0331 /* uint16_t */117#define DPRAM_INFO_BUSSTATE2 0x0335 /* uint16_t */118#define DPRAM_INFO_ERRSTATE 0x0339 /* uint16_t */119#define DPRAM_INFO_ERRSTATE2 0x033d /* uint16_t */120#define DPRAM_RESET 0x0341 /* uint16_t */121#define DPRAM_CLR_RECV_FIFO 0x0345 /* uint16_t */122#define DPRAM_RESET_TIME 0x034d /* uint16_t */123#define DPRAM_TIME 0x0350 /* uint64_t */124#define DPRAM_WR_START 0x0358 /* uint8_t */125#define DPRAM_WR_END 0x0359 /* uint8_t */126#define DPRAM_RESET_RX_FIFO 0x0361 /* uint16_t */127#define DPRAM_RESET_TX_FIFO 0x0364 /* uint8_t */128#define DPRAM_READ_FIFO_LEVEL 0x0365 /* uint8_t */129#define DPRAM_RX_FIFO_LEVEL 0x0366 /* uint16_t */130#define DPRAM_TX_FIFO_LEVEL 0x0366 /* uint16_t */131 132#define DPRAM_TX 0x0400 /* uint16_t */133 #define DPRAM_TX_SIZE 16134 #define DPRAM_TX_CNT 32135#define DPRAM_TX_RD 0x0601 /* uint8_t */136#define DPRAM_TX_WR 0x0605 /* uint8_t */137 138#define DPRAM_COMMAND 0x07e0 /* uint16_t */139#define DPRAM_RECEIPT 0x07f0 /* uint16_t */140#define DPRAM_IRQ_TOHOST 0x07fe /* uint8_t */141#define DPRAM_IRQ_TOCARD 0x07ff /* uint8_t */142 143#define DPRAM_V2_RESET 0x0e00 /* uint8_t */144#define DPRAM_V2_IRQ_TOHOST 0x0e02 /* uint8_t */145 146#define TXMAX (DPRAM_TX_CNT - 1)147 148/* DPRAM return codes */149#define RES_NONE 0150#define RES_OK 1151#define RES_NOK 2152#define RES_UNKNOWN 3153/* DPRAM flags */154#define CMD_TX 0x01155#define CMD_ACK 0x02156#define CMD_XTD 0x04157#define CMD_RTR 0x08158#define CMD_ERR 0x10159#define CMD_BUS2 0x80160 161/* returned fifo entry bus state masks */162#define SF_MASK_BUSOFF 0x80163#define SF_MASK_EPASSIVE 0x60164 165/* bus states */166#define STATE_BUSOFF 2167#define STATE_EPASSIVE 1168#define STATE_EACTIVE 0169