1 files changed, 222 insertions, 0 deletions

diff --git a/drivers/net/can/usb/peak_usb/pcan_ucan.h b/drivers/net/can/usb/peak_usb/pcan_ucan.h
new file mode 100644
index 000000000000..1ba7c25002e1
--- /dev/null
+++ b/drivers/net/can/usb/peak_usb/pcan_ucan.h
@@ -0,0 +1,222 @@
+/*
+ * CAN driver for PEAK System micro-CAN based adapters
+ *
+ * Copyright (C) 2003-2011 PEAK System-Technik GmbH
+ * Copyright (C) 2011-2013 Stephane Grosjean <s.grosjean@peak-system.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+#ifndef PUCAN_H
+#define PUCAN_H
+
+/* uCAN commands opcodes list (low-order 10 bits) */
+#define PUCAN_CMD_NOP                   0x000
+#define PUCAN_CMD_RESET_MODE            0x001
+#define PUCAN_CMD_NORMAL_MODE           0x002
+#define PUCAN_CMD_LISTEN_ONLY_MODE      0x003
+#define PUCAN_CMD_TIMING_SLOW           0x004
+#define PUCAN_CMD_TIMING_FAST           0x005
+#define PUCAN_CMD_FILTER_STD            0x008
+#define PUCAN_CMD_TX_ABORT              0x009
+#define PUCAN_CMD_WR_ERR_CNT            0x00a
+#define PUCAN_CMD_RX_FRAME_ENABLE       0x00b
+#define PUCAN_CMD_RX_FRAME_DISABLE      0x00c
+#define PUCAN_CMD_END_OF_COLLECTION     0x3ff
+
+/* uCAN received messages list */
+#define PUCAN_MSG_CAN_RX                0x0001
+#define PUCAN_MSG_ERROR                 0x0002
+#define PUCAN_MSG_STATUS                0x0003
+#define PUCAN_MSG_BUSLOAD               0x0004
+#define PUCAN_MSG_CAN_TX                0x1000
+
+/* uCAN command common header */
+struct __packed pucan_command {
+        __le16  opcode_channel;
+        u16     args[3];
+};
+
+/* uCAN TIMING_SLOW command fields */
+#define PUCAN_TSLOW_SJW_T(s, t)         (((s) & 0xf) | ((!!(t)) << 7))
+#define PUCAN_TSLOW_TSEG2(t)            ((t) & 0xf)
+#define PUCAN_TSLOW_TSEG1(t)            ((t) & 0x3f)
+#define PUCAN_TSLOW_BRP(b)              ((b) & 0x3ff)
+
+struct __packed pucan_timing_slow {
+        __le16  opcode_channel;
+
+        u8      ewl;            /* Error Warning limit */
+        u8      sjw_t;          /* Sync Jump Width + Triple sampling */
+        u8      tseg2;          /* Timing SEGment 2 */
+        u8      tseg1;          /* Timing SEGment 1 */
+
+        __le16  brp;            /* BaudRate Prescaler */
+};
+
+/* uCAN TIMING_FAST command fields */
+#define PUCAN_TFAST_SJW(s)              ((s) & 0x3)
+#define PUCAN_TFAST_TSEG2(t)            ((t) & 0x7)
+#define PUCAN_TFAST_TSEG1(t)            ((t) & 0xf)
+#define PUCAN_TFAST_BRP(b)              ((b) & 0x3ff)
+
+struct __packed pucan_timing_fast {
+        __le16  opcode_channel;
+
+        u8      unused;
+        u8      sjw;            /* Sync Jump Width */
+        u8      tseg2;          /* Timing SEGment 2 */
+        u8      tseg1;          /* Timing SEGment 1 */
+
+        __le16  brp;            /* BaudRate Prescaler */
+};
+
+/* uCAN FILTER_STD command fields */
+#define PUCAN_FLTSTD_ROW_IDX_BITS       6
+
+struct __packed pucan_filter_std {
+        __le16  opcode_channel;
+
+        __le16  idx;
+        __le32  mask;           /* CAN-ID bitmask in idx range */
+};
+
+/* uCAN WR_ERR_CNT command fields */
+#define PUCAN_WRERRCNT_TE               0x4000  /* Tx error cntr write Enable */
+#define PUCAN_WRERRCNT_RE               0x8000  /* Rx error cntr write Enable */
+
+struct __packed pucan_wr_err_cnt {
+        __le16  opcode_channel;
+
+        __le16  sel_mask;
+        u8      tx_counter;     /* Tx error counter new value */
+        u8      rx_counter;     /* Rx error counter new value */
+
+        u16     unused;
+};
+
+/* uCAN RX_FRAME_ENABLE command fields */
+#define PUCAN_FLTEXT_ERROR              0x0001
+#define PUCAN_FLTEXT_BUSLOAD            0x0002
+
+struct __packed pucan_filter_ext {
+        __le16  opcode_channel;
+
+        __le16  ext_mask;
+        u32     unused;
+};
+
+/* uCAN received messages global format */
+struct __packed pucan_msg {
+        __le16  size;
+        __le16  type;
+        __le32  ts_low;
+        __le32  ts_high;
+};
+
+/* uCAN flags for CAN/CANFD messages */
+#define PUCAN_MSG_SELF_RECEIVE          0x80
+#define PUCAN_MSG_ERROR_STATE_IND       0x40    /* error state indicator */
+#define PUCAN_MSG_BITRATE_SWITCH        0x20    /* bitrate switch */
+#define PUCAN_MSG_EXT_DATA_LEN          0x10    /* extended data length */
+#define PUCAN_MSG_SINGLE_SHOT           0x08
+#define PUCAN_MSG_LOOPED_BACK           0x04
+#define PUCAN_MSG_EXT_ID                0x02
+#define PUCAN_MSG_RTR                   0x01
+
+struct __packed pucan_rx_msg {
+        __le16  size;
+        __le16  type;
+        __le32  ts_low;
+        __le32  ts_high;
+        __le32  tag_low;
+        __le32  tag_high;
+        u8      channel_dlc;
+        u8      client;
+        __le16  flags;
+        __le32  can_id;
+        u8      d[0];
+};
+
+/* uCAN error types */
+#define PUCAN_ERMSG_BIT_ERROR           0
+#define PUCAN_ERMSG_FORM_ERROR          1
+#define PUCAN_ERMSG_STUFF_ERROR         2
+#define PUCAN_ERMSG_OTHER_ERROR         3
+#define PUCAN_ERMSG_ERR_CNT_DEC         4
+
+struct __packed pucan_error_msg {
+        __le16  size;
+        __le16  type;
+        __le32  ts_low;
+        __le32  ts_high;
+        u8      channel_type_d;
+        u8      code_g;
+        u8      tx_err_cnt;
+        u8      rx_err_cnt;
+};
+
+#define PUCAN_BUS_PASSIVE               0x20
+#define PUCAN_BUS_WARNING               0x40
+#define PUCAN_BUS_BUSOFF                0x80
+
+struct __packed pucan_status_msg {
+        __le16  size;
+        __le16  type;
+        __le32  ts_low;
+        __le32  ts_high;
+        u8      channel_p_w_b;
+        u8      unused[3];
+};
+
+/* uCAN transmitted message format */
+#define PUCAN_MSG_CHANNEL_DLC(c, d)     (((c) & 0xf) | ((d) << 4))
+
+struct __packed pucan_tx_msg {
+        __le16  size;
+        __le16  type;
+        __le32  tag_low;
+        __le32  tag_high;
+        u8      channel_dlc;
+        u8      client;
+        __le16  flags;
+        __le32  can_id;
+        u8      d[0];
+};
+
+/* build the cmd opcode_channel field with respect to the correct endianness */
+static inline __le16 pucan_cmd_opcode_channel(struct peak_usb_device *dev,
+                                              int opcode)
+{
+        return cpu_to_le16(((dev->ctrl_idx) << 12) | ((opcode) & 0x3ff));
+}
+
+/* return the channel number part from any received message channel_dlc field */
+static inline int pucan_msg_get_channel(struct pucan_rx_msg *rm)
+{
+        return rm->channel_dlc & 0xf;
+}
+
+/* return the dlc value from any received message channel_dlc field */
+static inline int pucan_msg_get_dlc(struct pucan_rx_msg *rm)
+{
+        return rm->channel_dlc >> 4;
+}
+
+static inline int pucan_ermsg_get_channel(struct pucan_error_msg *em)
+{
+        return em->channel_type_d & 0x0f;
+}
+
+static inline int pucan_stmsg_get_channel(struct pucan_status_msg *sm)
+{
+        return sm->channel_p_w_b & 0x0f;
+}
+
+#endif