can: peak: add support for PEAK PCAN-PCIe FD CAN-FD boards

This patch adds the support of the PCAN-PCI Express FD boards made
by PEAK-System, for computers using the PCI Express slot.

The PCAN-PCI Express FD has one or two CAN FD channels, depending
on the model. A galvanic isolation of the CAN ports protects
the electronics of the card and the respective computer against
disturbances of up to 500 Volts. The PCAN-PCI Express FD can be operated
with ambient temperatures in a range of -40 to +85 °C.

Such boards run an extented version of the CAN-FD IP running into USB
CAN-FD interfaces from PEAK-System, so this patch adds several new commands
and their corresponding data types to the PEAK CAN-FD common definitions
header file too.

Signed-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

1 files changed, 65 insertions, 0 deletions

diff --git a/include/linux/can/dev/peak_canfd.h b/include/linux/can/dev/peak_canfd.h
index 25e20ef2fef8..46dceef2cfa6 100644
--- a/include/linux/can/dev/peak_canfd.h
+++ b/include/linux/can/dev/peak_canfd.h
@@ -23,11 +23,14 @@
 #define PUCAN_CMD_LISTEN_ONLY_MODE	0x003
 #define PUCAN_CMD_TIMING_SLOW		0x004
 #define PUCAN_CMD_TIMING_FAST		0x005
+#define PUCAN_CMD_SET_STD_FILTER	0x006
+#define PUCAN_CMD_RESERVED2		0x007
 #define PUCAN_CMD_FILTER_STD		0x008
 #define PUCAN_CMD_TX_ABORT		0x009
 #define PUCAN_CMD_WR_ERR_CNT		0x00a
 #define PUCAN_CMD_SET_EN_OPTION		0x00b
 #define PUCAN_CMD_CLR_DIS_OPTION	0x00c
+#define PUCAN_CMD_RX_BARRIER		0x010
 #define PUCAN_CMD_END_OF_COLLECTION	0x3ff
 
 /* uCAN received messages list */
@@ -35,6 +38,10 @@
 #define PUCAN_MSG_ERROR			0x0002
 #define PUCAN_MSG_STATUS		0x0003
 #define PUCAN_MSG_BUSLOAD		0x0004
+
+#define PUCAN_MSG_CACHE_CRITICAL	0x0102
+
+/* uCAN transmitted messages */
 #define PUCAN_MSG_CAN_TX		0x1000
 
 /* uCAN command common header */
@@ -43,6 +50,12 @@ struct __packed pucan_command {
 	u16	args[3];
 };
 
+/* return the opcode from the opcode_channel field of a command */
+static inline u16 pucan_cmd_get_opcode(struct pucan_command *c)
+{
+	return le16_to_cpu(c->opcode_channel) & 0x3ff;
+}
+
 #define PUCAN_TSLOW_BRP_BITS		10
 #define PUCAN_TSLOW_TSGEG1_BITS		8
 #define PUCAN_TSLOW_TSGEG2_BITS		7
@@ -108,6 +121,27 @@ struct __packed pucan_filter_std {
 	__le32	mask;		/* CAN-ID bitmask in idx range */
 };
 
+#define PUCAN_FLTSTD_ROW_IDX_MAX	((1 << PUCAN_FLTSTD_ROW_IDX_BITS) - 1)
+
+/* uCAN SET_STD_FILTER command fields */
+struct __packed pucan_std_filter {
+	__le16	opcode_channel;
+
+	u8	unused;
+	u8	idx;
+	__le32	mask;		/* CAN-ID bitmask in idx range */
+};
+
+/* uCAN TX_ABORT commands fields */
+#define PUCAN_TX_ABORT_FLUSH		0x0001
+
+struct __packed pucan_tx_abort {
+	__le16	opcode_channel;
+
+	__le16	flags;
+	u32	unused;
+};
+
 /* 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 */
@@ -184,6 +218,12 @@ struct __packed pucan_error_msg {
 	u8	rx_err_cnt;
 };
 
+static inline int pucan_error_get_channel(const struct pucan_error_msg *msg)
+{
+	return msg->channel_type_d & 0x0f;
+}
+
+#define PUCAN_RX_BARRIER		0x10
 #define PUCAN_BUS_PASSIVE		0x20
 #define PUCAN_BUS_WARNING		0x40
 #define PUCAN_BUS_BUSOFF		0x80
@@ -197,6 +237,31 @@ struct __packed pucan_status_msg {
 	u8	unused[3];
 };
 
+static inline int pucan_status_get_channel(const struct pucan_status_msg *msg)
+{
+	return msg->channel_p_w_b & 0x0f;
+}
+
+static inline int pucan_status_is_rx_barrier(const struct pucan_status_msg *msg)
+{
+	return msg->channel_p_w_b & PUCAN_RX_BARRIER;
+}
+
+static inline int pucan_status_is_passive(const struct pucan_status_msg *msg)
+{
+	return msg->channel_p_w_b & PUCAN_BUS_PASSIVE;
+}
+
+static inline int pucan_status_is_warning(const struct pucan_status_msg *msg)
+{
+	return msg->channel_p_w_b & PUCAN_BUS_WARNING;
+}
+
+static inline int pucan_status_is_busoff(const struct pucan_status_msg *msg)
+{
+	return msg->channel_p_w_b & PUCAN_BUS_BUSOFF;
+}
+
 /* uCAN transmitted message format */
 #define PUCAN_MSG_CHANNEL_DLC(c, d)	(((c) & 0xf) | ((d) << 4))