softing.h (4513B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * softing common interfaces 4 * 5 * by Kurt Van Dijck, 2008-2010 6 */ 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 resume 63 */ 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 irq 93 * only called with fw.lock locked 94 */ 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 0x0000 106 #define DPRAM_RX_SIZE 32 107 #define DPRAM_RX_CNT 16 108#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 16 134 #define DPRAM_TX_CNT 32 135#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 0 150#define RES_OK 1 151#define RES_NOK 2 152#define RES_UNKNOWN 3 153/* DPRAM flags */ 154#define CMD_TX 0x01 155#define CMD_ACK 0x02 156#define CMD_XTD 0x04 157#define CMD_RTR 0x08 158#define CMD_ERR 0x10 159#define CMD_BUS2 0x80 160 161/* returned fifo entry bus state masks */ 162#define SF_MASK_BUSOFF 0x80 163#define SF_MASK_EPASSIVE 0x60 164 165/* bus states */ 166#define STATE_BUSOFF 2 167#define STATE_EPASSIVE 1 168#define STATE_EACTIVE 0