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 18 struct softing; 19 20 struct 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 37 struct 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 75 int softing_default_output(struct net_device *netdev); 76 77 ktime_t softing_raw2ktime(struct softing *card, u32 raw); 78 79 int softing_chip_poweron(struct softing *card); 80 81 int softing_bootloader_command(struct softing *card, int16_t cmd, 82 const char *msg); 83 84 /* Load firmware after reset */ 85 int 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 */ 89 int 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 */ 95 int softing_enable_irq(struct softing *card, int enable); 96 97 /* start/stop 1 bus on card */ 98 int softing_startstop(struct net_device *netdev, int up); 99 100 /* netif_rx() */ 101 int 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 0 169