forked from Minki/linux
fe5b40642f
This fixes the bitimings fields ranges supported by all the CAN-FD USB interfaces of the PEAK-System CAN-FD adapters. Very first development versions of the IP core API defined smaller TSGEx and SJW fields for both nominal and data bittimings records than the production versions. This patch fixes them by enlarging their sizes to the actual values: field: old size: fixed size: nominal TSGEG1 6 8 nominal TSGEG2 4 7 nominal SJW 4 7 data TSGEG1 4 5 data TSGEG2 3 4 data SJW 2 4 Note that this has no other consequences than offering larger choice to bitrate encoding. Signed-off-by: Stephane Grosjean <s.grosjean@peak-system.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
245 lines
6.4 KiB
C
245 lines
6.4 KiB
C
/*
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* CAN driver for PEAK System micro-CAN based adapters
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*
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* Copyright (C) 2003-2011 PEAK System-Technik GmbH
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* Copyright (C) 2011-2013 Stephane Grosjean <s.grosjean@peak-system.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published
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* by the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#ifndef PUCAN_H
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#define PUCAN_H
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/* uCAN commands opcodes list (low-order 10 bits) */
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#define PUCAN_CMD_NOP 0x000
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#define PUCAN_CMD_RESET_MODE 0x001
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#define PUCAN_CMD_NORMAL_MODE 0x002
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#define PUCAN_CMD_LISTEN_ONLY_MODE 0x003
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#define PUCAN_CMD_TIMING_SLOW 0x004
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#define PUCAN_CMD_TIMING_FAST 0x005
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#define PUCAN_CMD_FILTER_STD 0x008
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#define PUCAN_CMD_TX_ABORT 0x009
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#define PUCAN_CMD_WR_ERR_CNT 0x00a
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#define PUCAN_CMD_SET_EN_OPTION 0x00b
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#define PUCAN_CMD_CLR_DIS_OPTION 0x00c
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#define PUCAN_CMD_END_OF_COLLECTION 0x3ff
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/* uCAN received messages list */
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#define PUCAN_MSG_CAN_RX 0x0001
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#define PUCAN_MSG_ERROR 0x0002
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#define PUCAN_MSG_STATUS 0x0003
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#define PUCAN_MSG_BUSLOAD 0x0004
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#define PUCAN_MSG_CAN_TX 0x1000
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/* uCAN command common header */
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struct __packed pucan_command {
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__le16 opcode_channel;
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u16 args[3];
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};
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#define PUCAN_TSLOW_BRP_BITS 10
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#define PUCAN_TSLOW_TSGEG1_BITS 8
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#define PUCAN_TSLOW_TSGEG2_BITS 7
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#define PUCAN_TSLOW_SJW_BITS 7
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#define PUCAN_TSLOW_BRP_MASK ((1 << PUCAN_TSLOW_BRP_BITS) - 1)
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#define PUCAN_TSLOW_TSEG1_MASK ((1 << PUCAN_TSLOW_TSGEG1_BITS) - 1)
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#define PUCAN_TSLOW_TSEG2_MASK ((1 << PUCAN_TSLOW_TSGEG2_BITS) - 1)
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#define PUCAN_TSLOW_SJW_MASK ((1 << PUCAN_TSLOW_SJW_BITS) - 1)
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/* uCAN TIMING_SLOW command fields */
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#define PUCAN_TSLOW_SJW_T(s, t) (((s) & PUCAN_TSLOW_SJW_MASK) | \
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((!!(t)) << 7))
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#define PUCAN_TSLOW_TSEG2(t) ((t) & PUCAN_TSLOW_TSEG2_MASK)
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#define PUCAN_TSLOW_TSEG1(t) ((t) & PUCAN_TSLOW_TSEG1_MASK)
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#define PUCAN_TSLOW_BRP(b) ((b) & PUCAN_TSLOW_BRP_MASK)
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struct __packed pucan_timing_slow {
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__le16 opcode_channel;
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u8 ewl; /* Error Warning limit */
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u8 sjw_t; /* Sync Jump Width + Triple sampling */
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u8 tseg2; /* Timing SEGment 2 */
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u8 tseg1; /* Timing SEGment 1 */
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__le16 brp; /* BaudRate Prescaler */
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};
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#define PUCAN_TFAST_BRP_BITS 10
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#define PUCAN_TFAST_TSGEG1_BITS 5
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#define PUCAN_TFAST_TSGEG2_BITS 4
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#define PUCAN_TFAST_SJW_BITS 4
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#define PUCAN_TFAST_BRP_MASK ((1 << PUCAN_TFAST_BRP_BITS) - 1)
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#define PUCAN_TFAST_TSEG1_MASK ((1 << PUCAN_TFAST_TSGEG1_BITS) - 1)
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#define PUCAN_TFAST_TSEG2_MASK ((1 << PUCAN_TFAST_TSGEG2_BITS) - 1)
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#define PUCAN_TFAST_SJW_MASK ((1 << PUCAN_TFAST_SJW_BITS) - 1)
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/* uCAN TIMING_FAST command fields */
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#define PUCAN_TFAST_SJW(s) ((s) & PUCAN_TFAST_SJW_MASK)
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#define PUCAN_TFAST_TSEG2(t) ((t) & PUCAN_TFAST_TSEG2_MASK)
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#define PUCAN_TFAST_TSEG1(t) ((t) & PUCAN_TFAST_TSEG1_MASK)
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#define PUCAN_TFAST_BRP(b) ((b) & PUCAN_TFAST_BRP_MASK)
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struct __packed pucan_timing_fast {
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__le16 opcode_channel;
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u8 unused;
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u8 sjw; /* Sync Jump Width */
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u8 tseg2; /* Timing SEGment 2 */
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u8 tseg1; /* Timing SEGment 1 */
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__le16 brp; /* BaudRate Prescaler */
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};
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/* uCAN FILTER_STD command fields */
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#define PUCAN_FLTSTD_ROW_IDX_BITS 6
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struct __packed pucan_filter_std {
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__le16 opcode_channel;
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__le16 idx;
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__le32 mask; /* CAN-ID bitmask in idx range */
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};
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/* uCAN WR_ERR_CNT command fields */
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#define PUCAN_WRERRCNT_TE 0x4000 /* Tx error cntr write Enable */
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#define PUCAN_WRERRCNT_RE 0x8000 /* Rx error cntr write Enable */
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struct __packed pucan_wr_err_cnt {
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__le16 opcode_channel;
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__le16 sel_mask;
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u8 tx_counter; /* Tx error counter new value */
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u8 rx_counter; /* Rx error counter new value */
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u16 unused;
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};
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/* uCAN SET_EN/CLR_DIS _OPTION command fields */
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#define PUCAN_OPTION_ERROR 0x0001
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#define PUCAN_OPTION_BUSLOAD 0x0002
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#define PUCAN_OPTION_CANDFDISO 0x0004
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struct __packed pucan_options {
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__le16 opcode_channel;
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__le16 options;
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u32 unused;
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};
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/* uCAN received messages global format */
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struct __packed pucan_msg {
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__le16 size;
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__le16 type;
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__le32 ts_low;
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__le32 ts_high;
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};
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/* uCAN flags for CAN/CANFD messages */
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#define PUCAN_MSG_SELF_RECEIVE 0x80
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#define PUCAN_MSG_ERROR_STATE_IND 0x40 /* error state indicator */
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#define PUCAN_MSG_BITRATE_SWITCH 0x20 /* bitrate switch */
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#define PUCAN_MSG_EXT_DATA_LEN 0x10 /* extended data length */
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#define PUCAN_MSG_SINGLE_SHOT 0x08
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#define PUCAN_MSG_LOOPED_BACK 0x04
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#define PUCAN_MSG_EXT_ID 0x02
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#define PUCAN_MSG_RTR 0x01
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struct __packed pucan_rx_msg {
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__le16 size;
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__le16 type;
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__le32 ts_low;
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__le32 ts_high;
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__le32 tag_low;
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__le32 tag_high;
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u8 channel_dlc;
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u8 client;
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__le16 flags;
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__le32 can_id;
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u8 d[0];
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};
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/* uCAN error types */
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#define PUCAN_ERMSG_BIT_ERROR 0
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#define PUCAN_ERMSG_FORM_ERROR 1
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#define PUCAN_ERMSG_STUFF_ERROR 2
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#define PUCAN_ERMSG_OTHER_ERROR 3
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#define PUCAN_ERMSG_ERR_CNT_DEC 4
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struct __packed pucan_error_msg {
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__le16 size;
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__le16 type;
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__le32 ts_low;
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__le32 ts_high;
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u8 channel_type_d;
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u8 code_g;
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u8 tx_err_cnt;
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u8 rx_err_cnt;
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};
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#define PUCAN_BUS_PASSIVE 0x20
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#define PUCAN_BUS_WARNING 0x40
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#define PUCAN_BUS_BUSOFF 0x80
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struct __packed pucan_status_msg {
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__le16 size;
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__le16 type;
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__le32 ts_low;
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__le32 ts_high;
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u8 channel_p_w_b;
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u8 unused[3];
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};
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/* uCAN transmitted message format */
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#define PUCAN_MSG_CHANNEL_DLC(c, d) (((c) & 0xf) | ((d) << 4))
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struct __packed pucan_tx_msg {
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__le16 size;
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__le16 type;
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__le32 tag_low;
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__le32 tag_high;
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u8 channel_dlc;
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u8 client;
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__le16 flags;
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__le32 can_id;
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u8 d[0];
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};
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/* build the cmd opcode_channel field with respect to the correct endianness */
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static inline __le16 pucan_cmd_opcode_channel(struct peak_usb_device *dev,
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int opcode)
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{
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return cpu_to_le16(((dev->ctrl_idx) << 12) | ((opcode) & 0x3ff));
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}
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/* return the channel number part from any received message channel_dlc field */
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static inline int pucan_msg_get_channel(struct pucan_rx_msg *rm)
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{
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return rm->channel_dlc & 0xf;
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}
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/* return the dlc value from any received message channel_dlc field */
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static inline int pucan_msg_get_dlc(struct pucan_rx_msg *rm)
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{
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return rm->channel_dlc >> 4;
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}
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static inline int pucan_ermsg_get_channel(struct pucan_error_msg *em)
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{
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return em->channel_type_d & 0x0f;
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}
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static inline int pucan_stmsg_get_channel(struct pucan_status_msg *sm)
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{
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return sm->channel_p_w_b & 0x0f;
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}
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#endif
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