include/linux/can/dev/peak

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This source file includes following definitions.
pucan_cmd_get_opcode
pucan_error_get_channel
pucan_status_get_channel
pucan_status_is_rx_barrier
pucan_status_is_passive
pucan_status_is_warning
pucan_status_is_busoff
pucan_cmd_opcode_channel
pucan_msg_get_channel
pucan_msg_get_dlc
pucan_ermsg_get_channel
pucan_stmsg_get_channel
   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * CAN driver for PEAK System micro-CAN based adapters
   4  *
   5  * Copyright (C) 2003-2011 PEAK System-Technik GmbH
   6  * Copyright (C) 2011-2013 Stephane Grosjean <s.grosjean@peak-system.com>
   7  */
   8 #ifndef PUCAN_H
   9 #define PUCAN_H
  10 
  11 /* uCAN commands opcodes list (low-order 10 bits) */
  12 #define PUCAN_CMD_NOP                   0x000
  13 #define PUCAN_CMD_RESET_MODE            0x001
  14 #define PUCAN_CMD_NORMAL_MODE           0x002
  15 #define PUCAN_CMD_LISTEN_ONLY_MODE      0x003
  16 #define PUCAN_CMD_TIMING_SLOW           0x004
  17 #define PUCAN_CMD_TIMING_FAST           0x005
  18 #define PUCAN_CMD_SET_STD_FILTER        0x006
  19 #define PUCAN_CMD_RESERVED2             0x007
  20 #define PUCAN_CMD_FILTER_STD            0x008
  21 #define PUCAN_CMD_TX_ABORT              0x009
  22 #define PUCAN_CMD_WR_ERR_CNT            0x00a
  23 #define PUCAN_CMD_SET_EN_OPTION         0x00b
  24 #define PUCAN_CMD_CLR_DIS_OPTION        0x00c
  25 #define PUCAN_CMD_RX_BARRIER            0x010
  26 #define PUCAN_CMD_END_OF_COLLECTION     0x3ff
  27 
  28 /* uCAN received messages list */
  29 #define PUCAN_MSG_CAN_RX                0x0001
  30 #define PUCAN_MSG_ERROR                 0x0002
  31 #define PUCAN_MSG_STATUS                0x0003
  32 #define PUCAN_MSG_BUSLOAD               0x0004
  33 
  34 #define PUCAN_MSG_CACHE_CRITICAL        0x0102
  35 
  36 /* uCAN transmitted messages */
  37 #define PUCAN_MSG_CAN_TX                0x1000
  38 
  39 /* uCAN command common header */
  40 struct __packed pucan_command {
  41         __le16  opcode_channel;
  42         u16     args[3];
  43 };
  44 
  45 /* return the opcode from the opcode_channel field of a command */
  46 static inline u16 pucan_cmd_get_opcode(struct pucan_command *c)
  47 {
  48         return le16_to_cpu(c->opcode_channel) & 0x3ff;
  49 }
  50 
  51 #define PUCAN_TSLOW_BRP_BITS            10
  52 #define PUCAN_TSLOW_TSGEG1_BITS         8
  53 #define PUCAN_TSLOW_TSGEG2_BITS         7
  54 #define PUCAN_TSLOW_SJW_BITS            7
  55 
  56 #define PUCAN_TSLOW_BRP_MASK            ((1 << PUCAN_TSLOW_BRP_BITS) - 1)
  57 #define PUCAN_TSLOW_TSEG1_MASK          ((1 << PUCAN_TSLOW_TSGEG1_BITS) - 1)
  58 #define PUCAN_TSLOW_TSEG2_MASK          ((1 << PUCAN_TSLOW_TSGEG2_BITS) - 1)
  59 #define PUCAN_TSLOW_SJW_MASK            ((1 << PUCAN_TSLOW_SJW_BITS) - 1)
  60 
  61 /* uCAN TIMING_SLOW command fields */
  62 #define PUCAN_TSLOW_SJW_T(s, t)         (((s) & PUCAN_TSLOW_SJW_MASK) | \
  63                                                                 ((!!(t)) << 7))
  64 #define PUCAN_TSLOW_TSEG2(t)            ((t) & PUCAN_TSLOW_TSEG2_MASK)
  65 #define PUCAN_TSLOW_TSEG1(t)            ((t) & PUCAN_TSLOW_TSEG1_MASK)
  66 #define PUCAN_TSLOW_BRP(b)              ((b) & PUCAN_TSLOW_BRP_MASK)
  67 
  68 struct __packed pucan_timing_slow {
  69         __le16  opcode_channel;
  70 
  71         u8      ewl;            /* Error Warning limit */
  72         u8      sjw_t;          /* Sync Jump Width + Triple sampling */
  73         u8      tseg2;          /* Timing SEGment 2 */
  74         u8      tseg1;          /* Timing SEGment 1 */
  75 
  76         __le16  brp;            /* BaudRate Prescaler */
  77 };
  78 
  79 #define PUCAN_TFAST_BRP_BITS            10
  80 #define PUCAN_TFAST_TSGEG1_BITS         5
  81 #define PUCAN_TFAST_TSGEG2_BITS         4
  82 #define PUCAN_TFAST_SJW_BITS            4
  83 
  84 #define PUCAN_TFAST_BRP_MASK            ((1 << PUCAN_TFAST_BRP_BITS) - 1)
  85 #define PUCAN_TFAST_TSEG1_MASK          ((1 << PUCAN_TFAST_TSGEG1_BITS) - 1)
  86 #define PUCAN_TFAST_TSEG2_MASK          ((1 << PUCAN_TFAST_TSGEG2_BITS) - 1)
  87 #define PUCAN_TFAST_SJW_MASK            ((1 << PUCAN_TFAST_SJW_BITS) - 1)
  88 
  89 /* uCAN TIMING_FAST command fields */
  90 #define PUCAN_TFAST_SJW(s)              ((s) & PUCAN_TFAST_SJW_MASK)
  91 #define PUCAN_TFAST_TSEG2(t)            ((t) & PUCAN_TFAST_TSEG2_MASK)
  92 #define PUCAN_TFAST_TSEG1(t)            ((t) & PUCAN_TFAST_TSEG1_MASK)
  93 #define PUCAN_TFAST_BRP(b)              ((b) & PUCAN_TFAST_BRP_MASK)
  94 
  95 struct __packed pucan_timing_fast {
  96         __le16  opcode_channel;
  97 
  98         u8      unused;
  99         u8      sjw;            /* Sync Jump Width */
 100         u8      tseg2;          /* Timing SEGment 2 */
 101         u8      tseg1;          /* Timing SEGment 1 */
 102 
 103         __le16  brp;            /* BaudRate Prescaler */
 104 };
 105 
 106 /* uCAN FILTER_STD command fields */
 107 #define PUCAN_FLTSTD_ROW_IDX_BITS       6
 108 
 109 struct __packed pucan_filter_std {
 110         __le16  opcode_channel;
 111 
 112         __le16  idx;
 113         __le32  mask;           /* CAN-ID bitmask in idx range */
 114 };
 115 
 116 #define PUCAN_FLTSTD_ROW_IDX_MAX        ((1 << PUCAN_FLTSTD_ROW_IDX_BITS) - 1)
 117 
 118 /* uCAN SET_STD_FILTER command fields */
 119 struct __packed pucan_std_filter {
 120         __le16  opcode_channel;
 121 
 122         u8      unused;
 123         u8      idx;
 124         __le32  mask;           /* CAN-ID bitmask in idx range */
 125 };
 126 
 127 /* uCAN TX_ABORT commands fields */
 128 #define PUCAN_TX_ABORT_FLUSH            0x0001
 129 
 130 struct __packed pucan_tx_abort {
 131         __le16  opcode_channel;
 132 
 133         __le16  flags;
 134         u32     unused;
 135 };
 136 
 137 /* uCAN WR_ERR_CNT command fields */
 138 #define PUCAN_WRERRCNT_TE               0x4000  /* Tx error cntr write Enable */
 139 #define PUCAN_WRERRCNT_RE               0x8000  /* Rx error cntr write Enable */
 140 
 141 struct __packed pucan_wr_err_cnt {
 142         __le16  opcode_channel;
 143 
 144         __le16  sel_mask;
 145         u8      tx_counter;     /* Tx error counter new value */
 146         u8      rx_counter;     /* Rx error counter new value */
 147 
 148         u16     unused;
 149 };
 150 
 151 /* uCAN SET_EN/CLR_DIS _OPTION command fields */
 152 #define PUCAN_OPTION_ERROR              0x0001
 153 #define PUCAN_OPTION_BUSLOAD            0x0002
 154 #define PUCAN_OPTION_CANDFDISO          0x0004
 155 
 156 struct __packed pucan_options {
 157         __le16  opcode_channel;
 158 
 159         __le16  options;
 160         u32     unused;
 161 };
 162 
 163 /* uCAN received messages global format */
 164 struct __packed pucan_msg {
 165         __le16  size;
 166         __le16  type;
 167         __le32  ts_low;
 168         __le32  ts_high;
 169 };
 170 
 171 /* uCAN flags for CAN/CANFD messages */
 172 #define PUCAN_MSG_SELF_RECEIVE          0x80
 173 #define PUCAN_MSG_ERROR_STATE_IND       0x40    /* error state indicator */
 174 #define PUCAN_MSG_BITRATE_SWITCH        0x20    /* bitrate switch */
 175 #define PUCAN_MSG_EXT_DATA_LEN          0x10    /* extended data length */
 176 #define PUCAN_MSG_SINGLE_SHOT           0x08
 177 #define PUCAN_MSG_LOOPED_BACK           0x04
 178 #define PUCAN_MSG_EXT_ID                0x02
 179 #define PUCAN_MSG_RTR                   0x01
 180 
 181 struct __packed pucan_rx_msg {
 182         __le16  size;
 183         __le16  type;
 184         __le32  ts_low;
 185         __le32  ts_high;
 186         __le32  tag_low;
 187         __le32  tag_high;
 188         u8      channel_dlc;
 189         u8      client;
 190         __le16  flags;
 191         __le32  can_id;
 192         u8      d[0];
 193 };
 194 
 195 /* uCAN error types */
 196 #define PUCAN_ERMSG_BIT_ERROR           0
 197 #define PUCAN_ERMSG_FORM_ERROR          1
 198 #define PUCAN_ERMSG_STUFF_ERROR         2
 199 #define PUCAN_ERMSG_OTHER_ERROR         3
 200 #define PUCAN_ERMSG_ERR_CNT_DEC         4
 201 
 202 struct __packed pucan_error_msg {
 203         __le16  size;
 204         __le16  type;
 205         __le32  ts_low;
 206         __le32  ts_high;
 207         u8      channel_type_d;
 208         u8      code_g;
 209         u8      tx_err_cnt;
 210         u8      rx_err_cnt;
 211 };
 212 
 213 static inline int pucan_error_get_channel(const struct pucan_error_msg *msg)
 214 {
 215         return msg->channel_type_d & 0x0f;
 216 }
 217 
 218 #define PUCAN_RX_BARRIER                0x10
 219 #define PUCAN_BUS_PASSIVE               0x20
 220 #define PUCAN_BUS_WARNING               0x40
 221 #define PUCAN_BUS_BUSOFF                0x80
 222 
 223 struct __packed pucan_status_msg {
 224         __le16  size;
 225         __le16  type;
 226         __le32  ts_low;
 227         __le32  ts_high;
 228         u8      channel_p_w_b;
 229         u8      unused[3];
 230 };
 231 
 232 static inline int pucan_status_get_channel(const struct pucan_status_msg *msg)
 233 {
 234         return msg->channel_p_w_b & 0x0f;
 235 }
 236 
 237 static inline int pucan_status_is_rx_barrier(const struct pucan_status_msg *msg)
 238 {
 239         return msg->channel_p_w_b & PUCAN_RX_BARRIER;
 240 }
 241 
 242 static inline int pucan_status_is_passive(const struct pucan_status_msg *msg)
 243 {
 244         return msg->channel_p_w_b & PUCAN_BUS_PASSIVE;
 245 }
 246 
 247 static inline int pucan_status_is_warning(const struct pucan_status_msg *msg)
 248 {
 249         return msg->channel_p_w_b & PUCAN_BUS_WARNING;
 250 }
 251 
 252 static inline int pucan_status_is_busoff(const struct pucan_status_msg *msg)
 253 {
 254         return msg->channel_p_w_b & PUCAN_BUS_BUSOFF;
 255 }
 256 
 257 /* uCAN transmitted message format */
 258 #define PUCAN_MSG_CHANNEL_DLC(c, d)     (((c) & 0xf) | ((d) << 4))
 259 
 260 struct __packed pucan_tx_msg {
 261         __le16  size;
 262         __le16  type;
 263         __le32  tag_low;
 264         __le32  tag_high;
 265         u8      channel_dlc;
 266         u8      client;
 267         __le16  flags;
 268         __le32  can_id;
 269         u8      d[0];
 270 };
 271 
 272 /* build the cmd opcode_channel field with respect to the correct endianness */
 273 static inline __le16 pucan_cmd_opcode_channel(int index, int opcode)
 274 {
 275         return cpu_to_le16(((index) << 12) | ((opcode) & 0x3ff));
 276 }
 277 
 278 /* return the channel number part from any received message channel_dlc field */
 279 static inline int pucan_msg_get_channel(const struct pucan_rx_msg *msg)
 280 {
 281         return msg->channel_dlc & 0xf;
 282 }
 283 
 284 /* return the dlc value from any received message channel_dlc field */
 285 static inline int pucan_msg_get_dlc(const struct pucan_rx_msg *msg)
 286 {
 287         return msg->channel_dlc >> 4;
 288 }
 289 
 290 static inline int pucan_ermsg_get_channel(const struct pucan_error_msg *msg)
 291 {
 292         return msg->channel_type_d & 0x0f;
 293 }
 294 
 295 static inline int pucan_stmsg_get_channel(const struct pucan_status_msg *msg)
 296 {
 297         return msg->channel_p_w_b & 0x0f;
 298 }
 299 
 300 #endif
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root/include/linux/can/dev/peak_canfd.h

INCLUDED FROM

DEFINITIONS
