From: Florian Ferg <flfe@xxxxxxxxxxxxxxx>
This patch adds the driver for the IXXAT USB-to-CAN interfaces. There
is an adapter for the older communication layer cl1 and another
adapter for the newer communication layer cl2.
Signed-off-by: Florian Ferg <flfe@xxxxxxxxxxxxxxx>
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Signed-off-by: Peter Seiderer <ps.report@xxxxxxx>
---
Changes v1 -> v7 (Florian Ferg <flfe@xxxxxxxxxxxxxxx>):
- for detailed history see
https://codeberg.org/psreport/socketcan-linux-ix-usb-can
Changes v7 -> v8 (Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>):
- port to recent net-next
Changes v8 -> v9 (Peter Seiderer <ps.report@xxxxxxx>):
Addressed review comments by Vincent Mailhol:
- update copyright headers (use SPDX identifier 'GPL-2.0-only'
instead of 'GPL-2.0', remove full GPL boilerplate)
- reorder includes (lexicographic order)
- remove IXXAT_USB_MODES defines (move modes directly in the
declaration of structs)
- remove bittiming defines (move directly in declaration of structs)
- remove _EP1_IN/_EP1_OUT defines (move directly in declaration of structs)
- remove rcv_size/snd_size vars (use sizeof(*cmd) and sizeof(cmd->res) directly)
- use GENMASK/FIELD_PREP (IXXAT_USB_CAN_BTR1_TIME_SEG1_MASK/IXXAT_USB_CAN_BTR1_TIME_SEG2_MASK)
- update dev_err/netdev_err (use %pe, remove 'Error:' prefix)
- use U32_MAX instead of 0x00000000FFFFFFFF
- do not increase the rx_bytes count when receiving a remove frame
- ixxat_can_msg_cl1/ixxat_can_msg_cl2 use union __le32 status
- do not increase the statistics for error frames
- do not use parenthesis in log messages
- remove double brackets (sparse workaround for struct init)
- fill netdev->ethtool_ops with default
- fill netdev->dev_port
- use FIELD_GET/FIELD_PREP instead of IXXAT_USB_DECODE_DLC/IXXAT_USB_ENCODE_DLC
- use driver_info intead of open coded ixxat_usb_get_adapter
Addressed checkpatch.pl warnings:
- change MODULE_LICENSE to 'GPL' - checkpatch.pl WARNING: Prefer "GPL" over "GPL v2"
Changes v9 -> v10 (Peter Seiderer <ps.report@xxxxxxx>):
Addressed review comments by Vincent Mailhol:
- use '8 * MEGA' in ixxat_usb_cl1.c for IXXAT_USB_CLOCK
- use '80 * MEGA' in ixxat_usb_cl2.c for IXXAT_USB_CLOCK
- direct set of cmd->mode in cl1 ixxat_usb_init_ctrl()
- direct set of cmd->btr0 and cmd->btr1 in cl1 ixxat_usb_init_ctrl()
- direct set of cmd->opmode in cl2 ixxat_usb_init_ctrl()
- direct set of cmd->exmode in cl2 ixxat_usb_init_ctrl()
- use 'void * const req' in ixxat_usb_send_cmd()
- avoid goto in ixxat_usb_send_cmd()
- avoid goto in ixxat_usb_restart()
- fix struct ixxat_tx_urb_context documentation (remove legacy/wrong dlc
and count description)
- use 'u8 _padding[3]' in struct ixxat_usb_power_cmd
- remove IXXAT_USB_DRIVER_NAME, use KBUILD_MODNAME instead
- use IXXAT_USB_BUS_TYPE_MASK and FIELD_GET(IXXAT_USB_BUS_TYPE_MASK, type)
- use U16_MAX/U32_MAX/U32_MIN in ixxat_usb_setup_cmd()
- rename req/req_size to cmd/cmd_size in ixxat_usb_send_cmd
- use IXXAT_USB_REQ_SIZE and direct sizeof in ixxat_usb_stop_ctrl()
- use IXXAT_USB_REQ_SIZE and direct sizeof in ixxat_usb_power_ctrl()
- use direct sizeof in ixxat_usb_reset_ctrl()
- use IXXAT_USB_RES_SIZE and direct sizeof in ixxat_usb_get_dev_caps()
- use IXXAT_USB_RES_SIZE and direct sizeof in ixxat_usb_get_dev_info()
- use IXXAT_USB_RES_SIZE and direct sizeof in ixxat_usb_start_ctrl()
- avoid goto and remove unneded time_ref check in ixxat_usb_start_ctrl()
- use IXXAT_USB_REQ_SIZE in ixxat_usb_init_ctrl()
- restructure code in ixxat_usb_decode_buf (no opaque pointer, reduce message
size if, reduce logging)
Additional changes:
- avoid possible overflow in ixxat_usb_decode_buf(), u8 vs. u16 for
variable 'size' calculations
- update Kconfig text (add IXXAT CAN-IDM200)
- fix ep_msg_in vs ep_msg_out typo in ixxat_usb_probe (as already fixed
in upstream driver ix_usb_can_2.0.366-REL)
---
drivers/net/can/usb/Kconfig | 18 +
drivers/net/can/usb/Makefile | 1 +
drivers/net/can/usb/ixxat_usb/Makefile | 2 +
drivers/net/can/usb/ixxat_usb/ixxat_usb_cl1.c | 100 ++
drivers/net/can/usb/ixxat_usb/ixxat_usb_cl2.c | 177 +++
.../net/can/usb/ixxat_usb/ixxat_usb_core.c | 1251 +++++++++++++++++
.../net/can/usb/ixxat_usb/ixxat_usb_core.h | 509 +++++++
7 files changed, 2058 insertions(+)
create mode 100644 drivers/net/can/usb/ixxat_usb/Makefile
create mode 100644 drivers/net/can/usb/ixxat_usb/ixxat_usb_cl1.c
create mode 100644 drivers/net/can/usb/ixxat_usb/ixxat_usb_cl2.c
create mode 100644 drivers/net/can/usb/ixxat_usb/ixxat_usb_core.c
create mode 100644 drivers/net/can/usb/ixxat_usb/ixxat_usb_core.h
diff --git a/drivers/net/can/usb/Kconfig b/drivers/net/can/usb/Kconfig
index 58fcd2b34820..da4b49b318d2 100644
--- a/drivers/net/can/usb/Kconfig
+++ b/drivers/net/can/usb/Kconfig
@@ -62,6 +62,24 @@ config CAN_GS_USB
choose Y for built in support,
M to compile as module (module will be named: gs_usb).
+config CAN_IXXAT_USB
+ tristate "IXXAT USB-to-CAN interfaces"
+ help
+ This driver adds support for IXXAT USB-to-CAN devices.
+
+ The driver provides support for the following devices:
+ - IXXAT USB-to-CAN compact
+ - IXXAT USB-to-CAN embedded
+ - IXXAT USB-to-CAN professional
+ - IXXAT USB-to-CAN automotive
+ - IXXAT USB-to-CAN FD compact
+ - IXXAT USB-to-CAN FD professional
+ - IXXAT USB-to-CAN FD automotive
+ - IXXAT USB-to-CAN FD MiniPCIe
+ - IXXAT USB-to-CAR
+ - IXXAT CAN-IDM101
+ - IXXAT CAN-IDM200
+
config CAN_KVASER_USB
tristate "Kvaser CAN/USB interface"
help
diff --git a/drivers/net/can/usb/Makefile b/drivers/net/can/usb/Makefile
index 8b11088e9a59..52b4cc66ff30 100644
--- a/drivers/net/can/usb/Makefile
+++ b/drivers/net/can/usb/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_CAN_ESD_USB) += esd_usb.o
obj-$(CONFIG_CAN_ETAS_ES58X) += etas_es58x/
obj-$(CONFIG_CAN_F81604) += f81604.o
obj-$(CONFIG_CAN_GS_USB) += gs_usb.o
+obj-$(CONFIG_CAN_IXXAT_USB) += ixxat_usb/
obj-$(CONFIG_CAN_KVASER_USB) += kvaser_usb/
obj-$(CONFIG_CAN_MCBA_USB) += mcba_usb.o
obj-$(CONFIG_CAN_PEAK_USB) += peak_usb/
diff --git a/drivers/net/can/usb/ixxat_usb/Makefile b/drivers/net/can/usb/ixxat_usb/Makefile
new file mode 100644
index 000000000000..125d2705979f
--- /dev/null
+++ b/drivers/net/can/usb/ixxat_usb/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_CAN_IXXAT_USB) += ixxat_usb2can.o
+ixxat_usb2can-y = ixxat_usb_cl1.o ixxat_usb_cl2.o ixxat_usb_core.o
diff --git a/drivers/net/can/usb/ixxat_usb/ixxat_usb_cl1.c b/drivers/net/can/usb/ixxat_usb/ixxat_usb_cl1.c
new file mode 100644
index 000000000000..5e62a62c3985
--- /dev/null
+++ b/drivers/net/can/usb/ixxat_usb/ixxat_usb_cl1.c
@@ -0,0 +1,100 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2018 HMS Industrial Networks <socketcan@xxxxxxxxxxxxxxx>
+ */
+
+#include <linux/can/dev.h>
+#include <linux/kernel.h>
+#include <linux/units.h>
+#include <linux/usb.h>
+
+#include "ixxat_usb_core.h"
+
+#define IXXAT_USB_CLOCK (8 * MEGA /* Hz */)
+
+#define IXXAT_USB_BUFFER_SIZE_RX 512
+#define IXXAT_USB_BUFFER_SIZE_TX 256
+
+#define IXXAT_USB_BTMODE_TSM_CL1 0x80
+
+#define IXXAT_USB_CAN_CMD_INIT 0x325
+
+#define IXXAT_USB_CAN_BTR0_BRP_MASK GENMASK(5, 0)
+#define IXXAT_USB_CAN_BTR0_SJW_MASK GENMASK(7, 6)
+
+#define IXXAT_USB_CAN_BTR1_TIME_SEG1_MASK GENMASK(3, 0)
+#define IXXAT_USB_CAN_BTR1_TIME_SEG2_MASK GENMASK(6, 4)
+
+static const struct can_bittiming_const usb2can_bt = {
+ .name = IXXAT_USB_CTRL_NAME,
+ .tseg1_min = 1,
+ .tseg1_max = 16,
+ .tseg2_min = 1,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 1,
+ .brp_max = 64,
+ .brp_inc = 1,
+};
+
+static int ixxat_usb_init_ctrl(struct ixxat_usb_device *dev)
+{
+ const struct can_bittiming *bt = &dev->can.bittiming;
+ const u16 port = dev->ctrl_index;
+ int err;
+ struct ixxat_usb_init_cl1_cmd *cmd;
+
+ cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
+ if (!cmd)
+ return -ENOMEM;
+
+ cmd->mode = IXXAT_USB_OPMODE_EXTENDED | IXXAT_USB_OPMODE_STANDARD;
+ if (dev->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)
+ cmd->mode |= IXXAT_USB_OPMODE_ERRFRAME;
+ if (dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)
+ cmd->mode |= IXXAT_USB_OPMODE_LISTONLY;
+
+ cmd->btr0 = FIELD_PREP(IXXAT_USB_CAN_BTR0_BRP_MASK, bt->brp - 1) |
+ FIELD_PREP(IXXAT_USB_CAN_BTR0_SJW_MASK, bt->sjw - 1);
+
+ cmd->btr1 = FIELD_PREP(IXXAT_USB_CAN_BTR1_TIME_SEG1_MASK, bt->prop_seg + bt->phase_seg1 - 1) |
+ FIELD_PREP(IXXAT_USB_CAN_BTR1_TIME_SEG2_MASK, bt->phase_seg2 - 1);
+ if (dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES)
+ cmd->btr1 |= IXXAT_USB_BTMODE_TSM_CL1;
+
+ ixxat_usb_setup_cmd(&cmd->req, &cmd->res);
+ cmd->req.size = cpu_to_le32(IXXAT_USB_REQ_SIZE(cmd));
+ cmd->req.code = cpu_to_le32(IXXAT_USB_CAN_CMD_INIT);
+ cmd->req.port = cpu_to_le16(port);
+
+ err = ixxat_usb_send_cmd(dev->udev, port, cmd, sizeof(*cmd), &cmd->res,
+ sizeof(cmd->res));
+ kfree(cmd);
+ return err;
+}
+
+const struct ixxat_usb_adapter usb2can_cl1 = {
+ .clock = IXXAT_USB_CLOCK,
+ .bt = &usb2can_bt,
+ .btd = NULL,
+ .modes = CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_BERR_REPORTING |
+ CAN_CTRLMODE_LISTENONLY,
+ .buffer_size_rx = IXXAT_USB_BUFFER_SIZE_RX,
+ .buffer_size_tx = IXXAT_USB_BUFFER_SIZE_TX,
+ .ep_msg_in = {
+ 1 | USB_DIR_IN,
+ 2 | USB_DIR_IN,
+ 3 | USB_DIR_IN,
+ 4 | USB_DIR_IN,
+ 5 | USB_DIR_IN,
+ },
+ .ep_msg_out = {
+ 1 | USB_DIR_OUT,
+ 2 | USB_DIR_OUT,
+ 3 | USB_DIR_OUT,
+ 4 | USB_DIR_OUT,
+ 5 | USB_DIR_OUT,
+ },
+ .ep_offs = 0,
+ .init_ctrl = ixxat_usb_init_ctrl
+};
diff --git a/drivers/net/can/usb/ixxat_usb/ixxat_usb_cl2.c b/drivers/net/can/usb/ixxat_usb/ixxat_usb_cl2.c
new file mode 100644
index 000000000000..3c9d05c4b34f
--- /dev/null
+++ b/drivers/net/can/usb/ixxat_usb/ixxat_usb_cl2.c
@@ -0,0 +1,177 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2018 HMS Industrial Networks <socketcan@xxxxxxxxxxxxxxx>
+ */
+
+#include <linux/can/dev.h>
+#include <linux/kernel.h>
+#include <linux/units.h>
+#include <linux/usb.h>
+
+#include "ixxat_usb_core.h"
+
+#define IXXAT_USB_CLOCK (80 * MEGA /* Hz */)
+
+#define IXXAT_USB_BUFFER_SIZE_RX 512
+#define IXXAT_USB_BUFFER_SIZE_TX 512
+
+#define IXXAT_USB_CAN_CMD_INIT 0x337
+
+static const struct can_bittiming_const usb2can_bt = {
+ .name = IXXAT_USB_CTRL_NAME,
+ .tseg1_min = 1,
+ .tseg1_max = 256,
+ .tseg2_min = 1,
+ .tseg2_max = 256,
+ .sjw_max = 128,
+ .brp_min = 2,
+ .brp_max = 513,
+ .brp_inc = 1,
+};
+
+static const struct can_bittiming_const usb2can_btd = {
+ .name = IXXAT_USB_CTRL_NAME,
+ .tseg1_min = 1,
+ .tseg1_max = 256,
+ .tseg2_min = 1,
+ .tseg2_max = 256,
+ .sjw_max = 128,
+ .brp_min = 2,
+ .brp_max = 513,
+ .brp_inc = 1,
+};
+
+static const struct can_bittiming_const canidm_bt = {
+ .name = IXXAT_USB_CTRL_NAME,
+ .tseg1_min = 1,
+ .tseg1_max = 256,
+ .tseg2_min = 1,
+ .tseg2_max = 128,
+ .sjw_max = 128,
+ .brp_min = 1,
+ .brp_max = 512,
+ .brp_inc = 1
+};
+
+static const struct can_bittiming_const canidm_btd = {
+ .name = IXXAT_USB_CTRL_NAME,
+ .tseg1_min = 1,
+ .tseg1_max = 32,
+ .tseg2_min = 1,
+ .tseg2_max = 16,
+ .sjw_max = 8,
+ .brp_min = 1,
+ .brp_max = 32,
+ .brp_inc = 1
+};
+
+static int ixxat_usb_init_ctrl(struct ixxat_usb_device *dev)
+{
+ const struct can_bittiming *bt = &dev->can.bittiming;
+ const struct can_bittiming *btd = &dev->can.data_bittiming;
+ const u16 port = dev->ctrl_index;
+ int err;
+ struct ixxat_usb_init_cl2_cmd *cmd;
+ u32 btmode = IXXAT_USB_BTMODE_NAT;
+
+ cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
+ if (!cmd)
+ return -ENOMEM;
+
+ cmd->opmode = IXXAT_USB_OPMODE_EXTENDED | IXXAT_USB_OPMODE_STANDARD;
+ if (dev->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)
+ cmd->opmode |= IXXAT_USB_OPMODE_ERRFRAME;
+ if (dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)
+ cmd->opmode |= IXXAT_USB_OPMODE_LISTONLY;
+
+ if (dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES)
+ btmode = IXXAT_USB_BTMODE_TSM;
+
+ cmd->exmode = 0;
+ if (dev->can.ctrlmode & (CAN_CTRLMODE_FD | CAN_CTRLMODE_FD_NON_ISO)) {
+ cmd->exmode |= IXXAT_USB_EXMODE_EXTDATA | IXXAT_USB_EXMODE_FASTDATA;
+
+ if (!(dev->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO))
+ cmd->exmode |= IXXAT_USB_EXMODE_ISOFD;
+ }
+
+ ixxat_usb_setup_cmd(&cmd->req, &cmd->res);
+ cmd->req.size = cpu_to_le32(sizeof(*cmd) - sizeof(cmd->res));
+ cmd->req.code = cpu_to_le32(IXXAT_USB_CAN_CMD_INIT);
+ cmd->req.port = cpu_to_le16(port);
+ cmd->sdr.mode = cpu_to_le32(btmode);
+ cmd->sdr.bps = cpu_to_le32(bt->brp);
+ cmd->sdr.ts1 = cpu_to_le16(bt->prop_seg + bt->phase_seg1);
+ cmd->sdr.ts2 = cpu_to_le16(bt->phase_seg2);
+ cmd->sdr.sjw = cpu_to_le16(bt->sjw);
+ cmd->sdr.tdo = 0;
+
+ if (cmd->exmode) {
+ cmd->fdr.mode = cpu_to_le32(btmode);
+ cmd->fdr.bps = cpu_to_le32(btd->brp);
+ cmd->fdr.ts1 = cpu_to_le16(btd->prop_seg + btd->phase_seg1);
+ cmd->fdr.ts2 = cpu_to_le16(btd->phase_seg2);
+ cmd->fdr.sjw = cpu_to_le16(btd->sjw);
+ cmd->fdr.tdo = cpu_to_le16(btd->brp * (btd->phase_seg1 + 1 +
+ btd->prop_seg));
+ }
+
+ err = ixxat_usb_send_cmd(dev->udev, port, cmd, sizeof(*cmd), &cmd->res,
+ sizeof(cmd->res));
+ kfree(cmd);
+ return err;
+}
+
+const struct ixxat_usb_adapter usb2can_cl2 = {
+ .clock = IXXAT_USB_CLOCK,
+ .bt = &usb2can_bt,
+ .btd = &usb2can_btd,
+ .modes = CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
+ CAN_CTRLMODE_BERR_REPORTING | CAN_CTRLMODE_FD |
+ CAN_CTRLMODE_FD_NON_ISO,
+ .buffer_size_rx = IXXAT_USB_BUFFER_SIZE_RX,
+ .buffer_size_tx = IXXAT_USB_BUFFER_SIZE_TX,
+ .ep_msg_in = {
+ 1 | USB_DIR_IN,
+ 2 | USB_DIR_IN,
+ 3 | USB_DIR_IN,
+ 4 | USB_DIR_IN,
+ 5 | USB_DIR_IN
+ },
+ .ep_msg_out = {
+ 1 | USB_DIR_OUT,
+ 2 | USB_DIR_OUT,
+ 3 | USB_DIR_OUT,
+ 4 | USB_DIR_OUT,
+ 5 | USB_DIR_OUT,
+ },
+ .ep_offs = 1,
+ .init_ctrl = ixxat_usb_init_ctrl
+};
+
+const struct ixxat_usb_adapter can_idm = {
+ .clock = IXXAT_USB_CLOCK,
+ .bt = &canidm_bt,
+ .btd = &canidm_btd,
+ .modes = CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
+ CAN_CTRLMODE_BERR_REPORTING | CAN_CTRLMODE_FD |
+ CAN_CTRLMODE_FD_NON_ISO,
+ .buffer_size_rx = IXXAT_USB_BUFFER_SIZE_RX,
+ .buffer_size_tx = IXXAT_USB_BUFFER_SIZE_TX,
+ .ep_msg_in = {
+ 2 | USB_DIR_IN,
+ 4 | USB_DIR_IN,
+ 6 | USB_DIR_IN,
+ 8 | USB_DIR_IN,
+ 10 | USB_DIR_IN,
+ },
+ .ep_msg_out = {
+ 1 | USB_DIR_OUT,
+ 3 | USB_DIR_OUT,
+ 5 | USB_DIR_OUT,
+ 7 | USB_DIR_OUT,
+ 9 | USB_DIR_OUT,
+ },
+ .ep_offs = 0,
+ .init_ctrl = ixxat_usb_init_ctrl
+};
diff --git a/drivers/net/can/usb/ixxat_usb/ixxat_usb_core.c b/drivers/net/can/usb/ixxat_usb/ixxat_usb_core.c
new file mode 100644
index 000000000000..c2728f6d3fd0
--- /dev/null
+++ b/drivers/net/can/usb/ixxat_usb/ixxat_usb_core.c
@@ -0,0 +1,1251 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2018 HMS Industrial Networks <socketcan@xxxxxxxxxxxxxxx>
+ */
+
+#include <linux/can/dev.h>
+#include <linux/ethtool.h>
+#include <linux/kernel.h>
+#include <linux/kthread.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+
+#include "ixxat_usb_core.h"
+
+MODULE_AUTHOR("Marcel Schmidt <socketcan@xxxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("CAN driver for IXXAT USB-to-CAN / CAN FD adapters");
+MODULE_LICENSE("GPL");
+
+/* Table of devices that work with this driver */
+static const struct usb_device_id ixxat_usb_table[] = {
+ { USB_DEVICE(IXXAT_USB_VENDOR_ID, USB2CAN_COMPACT_PRODUCT_ID),
+ .driver_info = (kernel_ulong_t)&usb2can_cl1, },
+ { USB_DEVICE(IXXAT_USB_VENDOR_ID, USB2CAN_EMBEDDED_PRODUCT_ID),
+ .driver_info = (kernel_ulong_t)&usb2can_cl1, },
+ { USB_DEVICE(IXXAT_USB_VENDOR_ID, USB2CAN_PROFESSIONAL_PRODUCT_ID),
+ .driver_info = (kernel_ulong_t)&usb2can_cl1, },
+ { USB_DEVICE(IXXAT_USB_VENDOR_ID, USB2CAN_AUTOMOTIVE_PRODUCT_ID),
+ .driver_info = (kernel_ulong_t)&usb2can_cl1, },
+ { USB_DEVICE(IXXAT_USB_VENDOR_ID, USB2CAN_FD_COMPACT_PRODUCT_ID),
+ .driver_info = (kernel_ulong_t)&usb2can_cl2, },
+ { USB_DEVICE(IXXAT_USB_VENDOR_ID, USB2CAN_FD_PROFESSIONAL_PRODUCT_ID),
+ .driver_info = (kernel_ulong_t)&usb2can_cl2, },
+ { USB_DEVICE(IXXAT_USB_VENDOR_ID, USB2CAN_FD_AUTOMOTIVE_PRODUCT_ID),
+ .driver_info = (kernel_ulong_t)&usb2can_cl2, },
+ { USB_DEVICE(IXXAT_USB_VENDOR_ID, USB2CAN_FD_PCIE_MINI_PRODUCT_ID),
+ .driver_info = (kernel_ulong_t)&usb2can_cl2, },
+ { USB_DEVICE(IXXAT_USB_VENDOR_ID, USB2CAR_PRODUCT_ID),
+ .driver_info = (kernel_ulong_t)&usb2can_cl2, },
+ { USB_DEVICE(IXXAT_USB_VENDOR_ID, CAN_IDM101_PRODUCT_ID),
+ .driver_info = (kernel_ulong_t)&can_idm, },
+ { USB_DEVICE(IXXAT_USB_VENDOR_ID, CAN_IDM200_PRODUCT_ID),
+ .driver_info = (kernel_ulong_t)&can_idm, },
+ { } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, ixxat_usb_table);
+
+void ixxat_usb_setup_cmd(struct ixxat_usb_dal_req *req,
+ struct ixxat_usb_dal_res *res)
+{
+ req->size = cpu_to_le32(sizeof(*req));
+ req->port = cpu_to_le16(U16_MAX);
+ req->socket = cpu_to_le16(U16_MAX);
+ req->code = cpu_to_le32(U32_MIN);
+
+ res->res_size = cpu_to_le32(sizeof(*res));
+ res->ret_size = cpu_to_le32(U32_MIN);
+ res->code = cpu_to_le32(U32_MAX);
+}
+
+int ixxat_usb_send_cmd(struct usb_device *dev, const u16 port, void * const cmd,
+ const u16 cmd_size, void *res, const u16 res_size)
+{
+ const int to = msecs_to_jiffies(IXXAT_USB_MSG_TIMEOUT);
+ const u8 rq = 0xff;
+ const u8 rti = USB_TYPE_VENDOR | USB_DIR_IN;
+ const u8 rto = USB_TYPE_VENDOR | USB_DIR_OUT;
+ int i;
+ int pos = 0;
+ int rcp = usb_rcvctrlpipe(dev, 0);
+ int scp = usb_sndctrlpipe(dev, 0);
+ int ret = 0;
+ struct ixxat_usb_dal_res *dal_res = res;
+
+ for (i = 0; i < IXXAT_USB_MAX_COM_REQ; ++i) {
+ ret = usb_control_msg(dev, scp, rq, rto, port, 0, cmd, cmd_size,
+ to);
+ if (ret < 0)
+ msleep(IXXAT_USB_MSG_CYCLE);
+ else
+ break;
+ }
+
+ if (ret < 0) {
+ dev_err(&dev->dev, "TX command failure: %pe\n", ERR_PTR(ret));
+ goto fail;
+ }
+
+ for (i = 0; i < IXXAT_USB_MAX_COM_REQ; ++i) {
+ const int rs = res_size - pos;
+ void *rb = res + pos;
+
+ ret = usb_control_msg(dev, rcp, rq, rti, port, 0, rb, rs, to);
+ if (ret < 0) {
+ msleep(IXXAT_USB_MSG_CYCLE);
+ continue;
+ }
+
+ pos += ret;
+ if (pos < res_size)
+ msleep(IXXAT_USB_MSG_CYCLE);
+ else
+ break;
+ }
+
+ if (pos != res_size)
+ ret = -EBADMSG;
+
+ if (ret < 0) {
+ dev_err(&dev->dev, "RX command failure: %pe\n", ERR_PTR(ret));
+ goto fail;
+ }
+
+ ret = le32_to_cpu(dal_res->code);
+
+fail:
+ return ret;
+}
+
+static void ixxat_usb_update_ts_now(struct ixxat_usb_device *dev, u32 ts_now)
+{
+ u32 *ts_dev = &dev->time_ref.ts_dev_0;
+ ktime_t *kt_host = &dev->time_ref.kt_host_0;
+ u64 timebase = (u64)U32_MAX - (u64)(*ts_dev) + (u64)ts_now;
+
+ *kt_host = ktime_add_us(*kt_host, timebase);
+ *ts_dev = ts_now;
+}
+
+static void ixxat_usb_get_ts_tv(struct ixxat_usb_device *dev, u32 ts,
+ ktime_t *k_time)
+{
+ ktime_t tmp_time = dev->time_ref.kt_host_0;
+
+ if (ts < dev->time_ref.ts_dev_last)
+ ixxat_usb_update_ts_now(dev, ts);
+
+ dev->time_ref.ts_dev_last = ts;
+ tmp_time = ktime_add_us(tmp_time, ts - dev->time_ref.ts_dev_0);
+
+ if (k_time)
+ *k_time = tmp_time;
+}
+
+static void ixxat_usb_set_ts_now(struct ixxat_usb_device *dev, u32 ts_now)
+{
+ dev->time_ref.ts_dev_0 = ts_now;
+ dev->time_ref.kt_host_0 = ktime_get_real();
+ dev->time_ref.ts_dev_last = ts_now;
+}
+
+static int ixxat_usb_get_dev_caps(struct usb_device *dev,
+ struct ixxat_dev_caps *dev_caps)
+{
+ int i;
+ int err;
+ struct ixxat_usb_caps_cmd *cmd;
+ u16 num_ctrl;
+
+ cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
+ if (!cmd)
+ return -ENOMEM;
+
+ ixxat_usb_setup_cmd(&cmd->req, &cmd->res);
+ cmd->req.code = cpu_to_le32(IXXAT_USB_BRD_CMD_GET_DEVCAPS);
+ cmd->res.res_size = cpu_to_le32(IXXAT_USB_RES_SIZE(cmd));
+
+ err = ixxat_usb_send_cmd(dev, le16_to_cpu(cmd->req.port), cmd,
+ sizeof(cmd->req) + sizeof(cmd->res),
+ &cmd->res, IXXAT_USB_RES_SIZE(cmd));
+ if (err)
+ goto fail;
+
+ dev_caps->bus_ctrl_count = cmd->caps.bus_ctrl_count;
+ num_ctrl = le16_to_cpu(dev_caps->bus_ctrl_count);
+ if (num_ctrl > ARRAY_SIZE(dev_caps->bus_ctrl_types)) {
+ err = -EINVAL;
+ goto fail;
+ }
+
+ for (i = 0; i < num_ctrl; i++)
+ dev_caps->bus_ctrl_types[i] = cmd->caps.bus_ctrl_types[i];
+
+fail:
+ kfree(cmd);
+ return err;
+}
+
+static int ixxat_usb_get_dev_info(struct usb_device *dev,
+ struct ixxat_dev_info *dev_info)
+{
+ int err;
+ struct ixxat_usb_info_cmd *cmd;
+
+ cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
+ if (!cmd)
+ return -ENOMEM;
+
+ ixxat_usb_setup_cmd(&cmd->req, &cmd->res);
+ cmd->req.code = cpu_to_le32(IXXAT_USB_BRD_CMD_GET_DEVINFO);
+ cmd->res.res_size = cpu_to_le32(IXXAT_USB_RES_SIZE(cmd));
+
+ err = ixxat_usb_send_cmd(dev, le16_to_cpu(cmd->req.port), cmd,
+ sizeof(cmd->req) + sizeof(cmd->res),
+ &cmd->res, IXXAT_USB_RES_SIZE(cmd));
+ if (err) {
+ kfree(cmd);
+ return err;
+ }
+
+ if (dev_info) {
+ memcpy(dev_info->device_id, &cmd->info.device_id,
+ sizeof(cmd->info.device_id));
+ memcpy(dev_info->device_name, &cmd->info.device_name,
+ sizeof(cmd->info.device_name));
+ dev_info->device_fpga_version = cmd->info.device_fpga_version;
+ dev_info->device_version = cmd->info.device_version;
+ }
+
+ kfree(cmd);
+ return 0;
+}
+
+static int ixxat_usb_start_ctrl(struct ixxat_usb_device *dev, u32 *time_ref)
+{
+ const u16 port = dev->ctrl_index;
+ int err;
+ struct ixxat_usb_start_cmd *cmd;
+
+ cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
+ if (!cmd)
+ return -ENOMEM;
+
+ ixxat_usb_setup_cmd(&cmd->req, &cmd->res);
+ cmd->req.code = cpu_to_le32(IXXAT_USB_CAN_CMD_START);
+ cmd->req.port = cpu_to_le16(port);
+ cmd->res.res_size = cpu_to_le32(IXXAT_USB_RES_SIZE(cmd));
+ cmd->time = 0;
+
+ err = ixxat_usb_send_cmd(dev->udev, port, cmd, sizeof(cmd->req) + sizeof(cmd->res),
+ &cmd->res, IXXAT_USB_RES_SIZE(cmd));
+ if (err) {
+ kfree(cmd);
+ return err;
+ }
+
+ *time_ref = le32_to_cpu(cmd->time);
+
+ kfree(cmd);
+ return 0;
+}
+
+static int ixxat_usb_stop_ctrl(struct ixxat_usb_device *dev)
+{
+ const u16 port = dev->ctrl_index;
+ int err;
+ struct ixxat_usb_stop_cmd *cmd;
+
+ cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
+ if (!cmd)
+ return -ENOMEM;
+
+ ixxat_usb_setup_cmd(&cmd->req, &cmd->res);
+ cmd->req.size = cpu_to_le32(IXXAT_USB_REQ_SIZE(cmd));
+ cmd->req.code = cpu_to_le32(IXXAT_USB_CAN_CMD_STOP);
+ cmd->req.port = cpu_to_le16(port);
+ cmd->action = cpu_to_le32(IXXAT_USB_STOP_ACTION_CLEARALL);
+
+ err = ixxat_usb_send_cmd(dev->udev, port, cmd, sizeof(*cmd), &cmd->res,
+ sizeof(cmd->res));
+ kfree(cmd);
+ return err;
+}
+
+static int ixxat_usb_power_ctrl(struct usb_device *dev, u8 mode)
+{
+ int err;
+ struct ixxat_usb_power_cmd *cmd;
+
+ cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
+ if (!cmd)
+ return -ENOMEM;
+
+ ixxat_usb_setup_cmd(&cmd->req, &cmd->res);
+ cmd->req.size = cpu_to_le32(IXXAT_USB_REQ_SIZE(cmd));
+ cmd->req.code = cpu_to_le32(IXXAT_USB_BRD_CMD_POWER);
+ cmd->mode = mode;
+
+ err = ixxat_usb_send_cmd(dev, le16_to_cpu(cmd->req.port), cmd, sizeof(*cmd),
+ &cmd->res, sizeof(cmd->res));
+ kfree(cmd);
+ return err;
+}
+
+static int ixxat_usb_reset_ctrl(struct ixxat_usb_device *dev)
+{
+ const u16 port = dev->ctrl_index;
+ int err;
+ struct ixxat_usb_dal_cmd *cmd;
+
+ cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
+ if (!cmd)
+ return -ENOMEM;
+
+ ixxat_usb_setup_cmd(&cmd->req, &cmd->res);
+ cmd->req.code = cpu_to_le32(IXXAT_USB_CAN_CMD_RESET);
+ cmd->req.port = cpu_to_le16(port);
+
+ err = ixxat_usb_send_cmd(dev->udev, port, cmd, sizeof(*cmd), &cmd->res,
+ sizeof(cmd->res));
+ kfree(cmd);
+ return err;
+}
+
+static void ixxat_usb_stop_queue(struct ixxat_usb_device *dev)
+{
+ struct net_device *netdev = dev->netdev;
+ u32 i;
+
+ netif_stop_queue(netdev);
+ usb_kill_anchored_urbs(&dev->rx_submitted);
+ usb_kill_anchored_urbs(&dev->tx_submitted);
+ atomic_set(&dev->active_tx_urbs, 0);
+ for (i = 0; i < IXXAT_USB_MAX_TX_URBS; i++) {
+ if (dev->tx_contexts[i].echo_index != IXXAT_USB_MAX_TX_URBS) {
+ can_free_echo_skb(netdev, i, NULL);
+ dev->tx_contexts[i].echo_index = IXXAT_USB_MAX_TX_URBS;
+ }
+ }
+}
+
+static int ixxat_usb_restart(struct ixxat_usb_device *dev)
+{
+ int err;
+ struct net_device *netdev = dev->netdev;
+ u32 t;
+
+ ixxat_usb_stop_queue(dev);
+ err = ixxat_usb_stop_ctrl(dev);
+ if (err)
+ return err;
+
+ err = ixxat_usb_start_ctrl(dev, &t);
+ if (err)
+ return err;
+
+ dev->can.state = CAN_STATE_ERROR_ACTIVE;
+ netif_wake_queue(netdev);
+
+ return 0;
+}
+
+static int ixxat_usb_set_mode(struct net_device *netdev, enum can_mode mode)
+{
+ struct ixxat_usb_device *dev = netdev_priv(netdev);
+
+ if (mode != CAN_MODE_START)
+ return -EOPNOTSUPP;
+
+ return ixxat_usb_restart(dev);
+}
+
+static int ixxat_usb_get_berr_counter(const struct net_device *netdev,
+ struct can_berr_counter *bec)
+{
+ struct ixxat_usb_device *dev = netdev_priv(netdev);
+
+ *bec = dev->bec;
+ return 0;
+}
+
+static int ixxat_usb_handle_canmsg(struct ixxat_usb_device *dev,
+ struct ixxat_can_msg *rx)
+{
+ const u32 ixx_flags = le32_to_cpu(rx->base.flags);
+ const u8 dlc = FIELD_GET(IXXAT_USB_MSG_FLAGS_DLC, ixx_flags);
+ struct canfd_frame *cf;
+ struct net_device *netdev = dev->netdev;
+ struct sk_buff *skb;
+ u8 flags = 0;
+ u8 len;
+ u8 min_size;
+
+ if (ixx_flags & IXXAT_USB_FDMSG_FLAGS_EDL) {
+ if (ixx_flags & IXXAT_USB_FDMSG_FLAGS_FDR)
+ flags |= CANFD_BRS;
+
+ if (ixx_flags & IXXAT_USB_FDMSG_FLAGS_ESI)
+ flags |= CANFD_ESI;
+
+ len = can_fd_dlc2len(dlc);
+ } else {
+ len = can_cc_dlc2len(dlc);
+ }
+
+ min_size = sizeof(rx->base) + len;
+
+ if (dev->adapter == &usb2can_cl1)
+ min_size += sizeof(rx->cl1) - sizeof(rx->cl1.data);
+ else
+ min_size += sizeof(rx->cl2) - sizeof(rx->cl2.data);
+
+ if (rx->base.size < (min_size - 1)) {
+ netdev_err(netdev, "Invalid can data message size\n");
+ return -EBADMSG;
+ }
+
+ if (ixx_flags & IXXAT_USB_MSG_FLAGS_OVR) {
+ netdev->stats.rx_over_errors++;
+ netdev->stats.rx_errors++;
+ netdev_err(netdev, "Message overflow\n");
+ }
+
+ if (ixx_flags & IXXAT_USB_FDMSG_FLAGS_EDL)
+ skb = alloc_canfd_skb(netdev, &cf);
+ else
+ skb = alloc_can_skb(netdev, (struct can_frame **)&cf);
+
+ if (!skb)
+ return -ENOMEM;
+
+ cf->can_id = le32_to_cpu(rx->base.msg_id);
+ cf->len = len;
+ cf->flags |= flags;
+
+ if (ixx_flags & IXXAT_USB_MSG_FLAGS_EXT)
+ cf->can_id |= CAN_EFF_FLAG;
+
+ if (ixx_flags & IXXAT_USB_MSG_FLAGS_RTR) {
+ cf->can_id |= CAN_RTR_FLAG;
+ } else {
+ if (dev->adapter == &usb2can_cl1)
+ memcpy(cf->data, rx->cl1.data, len);
+ else
+ memcpy(cf->data, rx->cl2.data, len);
+
+ netdev->stats.rx_bytes += cf->len;
+ }
+
+ ixxat_usb_get_ts_tv(dev, le32_to_cpu(rx->base.time), &skb->tstamp);
+
+ netdev->stats.rx_packets++;
+
+ netif_rx(skb);
+
+ return 0;
+}
+
+static int ixxat_usb_handle_status(struct ixxat_usb_device *dev,
+ struct ixxat_can_msg *rx)
+{
+ struct net_device *netdev = dev->netdev;
+ struct can_frame *can_frame;
+ struct sk_buff *skb;
+ enum can_state new_state = CAN_STATE_ERROR_ACTIVE;
+ u32 raw_status;
+ u8 min_size = sizeof(rx->base) + sizeof(raw_status);
+
+ if (dev->adapter == &usb2can_cl1)
+ min_size += sizeof(rx->cl1) - sizeof(rx->cl1.data);
+ else
+ min_size += sizeof(rx->cl2) - sizeof(rx->cl2.data);
+
+ if (rx->base.size < (min_size - 1)) {
+ netdev_err(netdev, "Invalid can status message size\n");
+ return -EBADMSG;
+ }
+
+ if (dev->adapter == &usb2can_cl1)
+ raw_status = le32_to_cpu(rx->cl1.status);
+ else
+ raw_status = le32_to_cpu(rx->cl2.status);
+
+ if (raw_status != IXXAT_USB_CAN_STATUS_OK) {
+ if (raw_status & IXXAT_USB_CAN_STATUS_BUSOFF) {
+ dev->can.can_stats.bus_off++;
+ new_state = CAN_STATE_BUS_OFF;
+ can_bus_off(netdev);
+ } else {
+ if (raw_status & IXXAT_USB_CAN_STATUS_ERRLIM) {
+ dev->can.can_stats.error_warning++;
+ new_state = CAN_STATE_ERROR_WARNING;
+ }
+
+ if (raw_status & IXXAT_USB_CAN_STATUS_ERR_PAS) {
+ dev->can.can_stats.error_passive++;
+ new_state = CAN_STATE_ERROR_PASSIVE;
+ }
+
+ if (raw_status & IXXAT_USB_CAN_STATUS_OVERRUN)
+ new_state = CAN_STATE_MAX;
+ }
+ }
+
+ if (new_state == CAN_STATE_ERROR_ACTIVE) {
+ dev->bec.txerr = 0;
+ dev->bec.rxerr = 0;
+ }
+
+ if (new_state != CAN_STATE_MAX)
+ dev->can.state = new_state;
+
+ skb = alloc_can_err_skb(netdev, &can_frame);
+ if (!skb)
+ return -ENOMEM;
+
+ switch (new_state) {
+ case CAN_STATE_ERROR_ACTIVE:
+ can_frame->can_id |= CAN_ERR_CRTL;
+ can_frame->data[1] |= CAN_ERR_CRTL_ACTIVE;
+ break;
+ case CAN_STATE_ERROR_WARNING:
+ can_frame->can_id |= CAN_ERR_CRTL;
+ can_frame->data[1] |= CAN_ERR_CRTL_TX_WARNING;
+ can_frame->data[1] |= CAN_ERR_CRTL_RX_WARNING;
+ break;
+ case CAN_STATE_ERROR_PASSIVE:
+ can_frame->can_id |= CAN_ERR_CRTL;
+ can_frame->data[1] |= CAN_ERR_CRTL_TX_PASSIVE;
+ can_frame->data[1] |= CAN_ERR_CRTL_RX_PASSIVE;
+ break;
+ case CAN_STATE_BUS_OFF:
+ can_frame->can_id |= CAN_ERR_BUSOFF;
+ break;
+ case CAN_STATE_MAX:
+ can_frame->can_id |= CAN_ERR_CRTL;
+ can_frame->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
+ break;
+ default:
+ netdev_err(netdev, "Unhandled can status %d\n",
+ new_state);
+ break;
+ }
+
+ netif_rx(skb);
+
+ return 0;
+}
+
+static int ixxat_usb_handle_error(struct ixxat_usb_device *dev,
+ struct ixxat_can_msg *rx)
+{
+ struct net_device *netdev = dev->netdev;
+ struct can_frame *can_frame;
+ struct sk_buff *skb;
+ u8 raw_error;
+ u8 min_size = sizeof(rx->base) + IXXAT_USB_CAN_ERROR_LEN;
+
+ if (dev->adapter == &usb2can_cl1)
+ min_size += sizeof(rx->cl1) - sizeof(rx->cl1.data);
+ else
+ min_size += sizeof(rx->cl2) - sizeof(rx->cl2.data);
+
+ if (rx->base.size < (min_size - 1)) {
+ netdev_err(netdev, "Invalid can error message size\n");
+ return -EBADMSG;
+ }
+
+ if (dev->can.state == CAN_STATE_BUS_OFF)
+ return 0;
+
+ if (dev->adapter == &usb2can_cl1) {
+ raw_error = rx->cl1.data[IXXAT_USB_CAN_ERROR_CODE];
+ dev->bec.rxerr = rx->cl1.data[IXXAT_USB_CAN_ERROR_COUNTER_RX];
+ dev->bec.txerr = rx->cl1.data[IXXAT_USB_CAN_ERROR_COUNTER_TX];
+ } else {
+ raw_error = rx->cl2.data[IXXAT_USB_CAN_ERROR_CODE];
+ dev->bec.rxerr = rx->cl2.data[IXXAT_USB_CAN_ERROR_COUNTER_RX];
+ dev->bec.txerr = rx->cl2.data[IXXAT_USB_CAN_ERROR_COUNTER_TX];
+ }
+
+ if (raw_error == IXXAT_USB_CAN_ERROR_ACK)
+ netdev->stats.tx_errors++;
+ else
+ netdev->stats.rx_errors++;
+
+ skb = alloc_can_err_skb(netdev, &can_frame);
+ if (!skb)
+ return -ENOMEM;
+
+ switch (raw_error) {
+ case IXXAT_USB_CAN_ERROR_ACK:
+ can_frame->can_id |= CAN_ERR_ACK;
+ break;
+ case IXXAT_USB_CAN_ERROR_BIT:
+ can_frame->can_id |= CAN_ERR_PROT;
+ can_frame->data[2] |= CAN_ERR_PROT_BIT;
+ break;
+ case IXXAT_USB_CAN_ERROR_CRC:
+ can_frame->can_id |= CAN_ERR_PROT;
+ can_frame->data[3] |= CAN_ERR_PROT_LOC_CRC_SEQ;
+ break;
+ case IXXAT_USB_CAN_ERROR_FORM:
+ can_frame->can_id |= CAN_ERR_PROT;
+ can_frame->data[2] |= CAN_ERR_PROT_FORM;
+ break;
+ case IXXAT_USB_CAN_ERROR_STUFF:
+ can_frame->can_id |= CAN_ERR_PROT;
+ can_frame->data[2] |= CAN_ERR_PROT_STUFF;
+ break;
+ default:
+ can_frame->can_id |= CAN_ERR_PROT;
+ can_frame->data[2] |= CAN_ERR_PROT_UNSPEC;
+ break;
+ }
+
+ netif_rx(skb);
+
+ return 0;
+}
+
+static void ixxat_usb_decode_buf(struct urb *urb)
+{
+ struct ixxat_usb_device *dev = urb->context;
+ struct net_device *netdev = dev->netdev;
+ struct ixxat_can_msg *can_msg;
+ int err = 0;
+ u32 pos = 0;
+
+ while (pos < urb->actual_length) {
+ u32 time;
+ u16 size;
+ u8 type;
+
+ can_msg = (struct ixxat_can_msg *)(urb->transfer_buffer + pos);
+ size = can_msg->base.size + 1;
+ if (size < sizeof(can_msg->base) ||
+ (pos + size) > urb->actual_length) {
+ netdev_err(netdev,
+ "Invalid usb message size\n");
+ return;
+ }
+
+ type = le32_to_cpu(can_msg->base.flags);
+ type &= IXXAT_USB_MSG_FLAGS_TYPE;
+ time = le32_to_cpu(can_msg->base.time);
+
+ switch (type) {
+ case IXXAT_USB_CAN_DATA:
+ err = ixxat_usb_handle_canmsg(dev, can_msg);
+ if (err)
+ goto fail;
+ break;
+ case IXXAT_USB_CAN_STATUS:
+ err = ixxat_usb_handle_status(dev, can_msg);
+ if (err)
+ goto fail;
+ break;
+ case IXXAT_USB_CAN_ERROR:
+ err = ixxat_usb_handle_error(dev, can_msg);
+ if (err)
+ goto fail;
+ break;
+ case IXXAT_USB_CAN_TIMEOVR:
+ ixxat_usb_get_ts_tv(dev, time, NULL);
+ break;
+ case IXXAT_USB_CAN_INFO:
+ case IXXAT_USB_CAN_WAKEUP:
+ case IXXAT_USB_CAN_TIMERST:
+ break;
+ default:
+ netdev_err(netdev,
+ "Unhandled rec type 0x%02x : ignored\n",
+ type);
+ break;
+ }
+
+ pos += size;
+ }
+
+fail:
+ if (err)
+ netdev_err(netdev, "Buffer decoding failed: %pe\n", ERR_PTR(err));
+}
+
+static int ixxat_usb_encode_msg(struct ixxat_usb_device *dev,
+ struct sk_buff *skb, u8 *obuf)
+{
+ int size;
+ struct canfd_frame *cf = (struct canfd_frame *)skb->data;
+ struct ixxat_can_msg can_msg = { 0 };
+ struct ixxat_can_msg_base *msg_base = &can_msg.base;
+ u32 flags = 0;
+ u32 msg_id = 0;
+
+ if (cf->can_id & CAN_RTR_FLAG)
+ flags |= IXXAT_USB_MSG_FLAGS_RTR;
+
+ if (cf->can_id & CAN_EFF_FLAG) {
+ flags |= IXXAT_USB_MSG_FLAGS_EXT;
+ msg_id = cf->can_id & CAN_EFF_MASK;
+ } else {
+ msg_id = cf->can_id & CAN_SFF_MASK;
+ }
+
+ if (can_is_canfd_skb(skb)) {
+ flags |= IXXAT_USB_FDMSG_FLAGS_EDL;
+
+ if (!(cf->can_id & CAN_RTR_FLAG) && (cf->flags & CANFD_BRS))
+ flags |= IXXAT_USB_FDMSG_FLAGS_FDR;
+
+ flags |= FIELD_PREP(IXXAT_USB_MSG_FLAGS_DLC, can_fd_len2dlc(cf->len));
+ } else {
+ flags |= FIELD_PREP(IXXAT_USB_MSG_FLAGS_DLC, cf->len);
+ }
+
+ msg_base->flags = cpu_to_le32(flags);
+ msg_base->msg_id = cpu_to_le32(msg_id);
+ msg_base->size = sizeof(*msg_base) + cf->len - 1;
+ if (dev->adapter == &usb2can_cl1) {
+ msg_base->size += sizeof(can_msg.cl1);
+ msg_base->size -= sizeof(can_msg.cl1.data);
+ memcpy(can_msg.cl1.data, cf->data, cf->len);
+ } else {
+ msg_base->size += sizeof(can_msg.cl2);
+ msg_base->size -= sizeof(can_msg.cl2.data);
+ memcpy(can_msg.cl2.data, cf->data, cf->len);
+ }
+
+ size = msg_base->size + 1;
+ memcpy(obuf, &can_msg, size);
+ return size;
+}
+
+static void ixxat_usb_read_bulk_callback(struct urb *urb)
+{
+ struct ixxat_usb_device *dev = urb->context;
+ const struct ixxat_usb_adapter *adapter = dev->adapter;
+ struct net_device *netdev = dev->netdev;
+ struct usb_device *udev = dev->udev;
+ int err;
+
+ if (!netif_device_present(netdev))
+ return;
+
+ switch (urb->status) {
+ case 0: /* success */
+ break;
+ case -EPROTO:
+ case -EILSEQ:
+ case -ENOENT:
+ case -ECONNRESET:
+ case -ESHUTDOWN:
+ return;
+ default:
+ netdev_err(netdev, "Rx urb aborted %d\n", urb->status);
+ goto resubmit_urb;
+ }
+
+ if (urb->actual_length > 0)
+ if (dev->state & IXXAT_USB_STATE_STARTED)
+ ixxat_usb_decode_buf(urb);
+
+resubmit_urb:
+ usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, dev->ep_msg_in),
+ urb->transfer_buffer, adapter->buffer_size_rx,
+ ixxat_usb_read_bulk_callback, dev);
+
+ usb_anchor_urb(urb, &dev->rx_submitted);
+ err = usb_submit_urb(urb, GFP_ATOMIC);
+ if (!err)
+ return;
+
+ usb_unanchor_urb(urb);
+
+ if (err == -ENODEV)
+ netif_device_detach(netdev);
+ else
+ netdev_err(netdev,
+ "Failed to resubmit read bulk urb: %pe\n", ERR_PTR(err));
+}
+
+static void ixxat_usb_write_bulk_callback(struct urb *urb)
+{
+ struct ixxat_tx_urb_context *context = urb->context;
+ struct ixxat_usb_device *dev;
+ struct net_device *netdev;
+
+ if (WARN_ON(!context))
+ return;
+
+ dev = context->dev;
+ netdev = dev->netdev;
+
+ if (!netif_device_present(netdev))
+ return;
+
+ if (!urb->status) {
+ netdev->stats.tx_packets++;
+ netdev->stats.tx_bytes += can_get_echo_skb(netdev, context->echo_index, NULL);
+ } else {
+ netdev_err(netdev, "Tx urb aborted: %pe\n", ERR_PTR(urb->status));
+ can_free_echo_skb(netdev, context->echo_index, NULL);
+ }
+
+ context->echo_index = IXXAT_USB_MAX_TX_URBS;
+ atomic_dec(&dev->active_tx_urbs);
+
+ if (!urb->status)
+ netif_wake_queue(netdev);
+}
+
+static netdev_tx_t ixxat_usb_start_xmit(struct sk_buff *skb,
+ struct net_device *netdev)
+{
+ int err;
+ int size;
+ struct ixxat_usb_device *dev = netdev_priv(netdev);
+ struct ixxat_tx_urb_context *context = NULL;
+ struct net_device_stats *stats = &netdev->stats;
+ struct urb *urb;
+ u8 *obuf;
+ u32 i;
+
+ if (can_dropped_invalid_skb(netdev, skb))
+ return NETDEV_TX_OK;
+
+ for (i = 0; i < IXXAT_USB_MAX_TX_URBS; i++) {
+ if (dev->tx_contexts[i].echo_index == IXXAT_USB_MAX_TX_URBS) {
+ context = dev->tx_contexts + i;
+ break;
+ }
+ }
+
+ if (WARN_ON_ONCE(!context))
+ return NETDEV_TX_BUSY;
+
+ urb = context->urb;
+ obuf = urb->transfer_buffer;
+
+ size = ixxat_usb_encode_msg(dev, skb, obuf);
+
+ context->echo_index = i;
+
+ urb->transfer_buffer_length = size;
+ usb_anchor_urb(urb, &dev->tx_submitted);
+ can_put_echo_skb(skb, netdev, i, 0);
+ atomic_inc(&dev->active_tx_urbs);
+
+ err = usb_submit_urb(urb, GFP_ATOMIC);
+ if (err) {
+ can_free_echo_skb(netdev, i, NULL);
+ usb_unanchor_urb(urb);
+ atomic_dec(&dev->active_tx_urbs);
+
+ context->echo_index = IXXAT_USB_MAX_TX_URBS;
+
+ if (err == -ENODEV) {
+ netif_device_detach(netdev);
+ } else {
+ stats->tx_dropped++;
+ netdev_err(netdev,
+ "Submitting tx-urb failed: %pe\n", ERR_PTR(err));
+ }
+ } else {
+ if (atomic_read(&dev->active_tx_urbs) >= IXXAT_USB_MAX_TX_URBS)
+ netif_stop_queue(netdev);
+ }
+
+ return NETDEV_TX_OK;
+}
+
+static int ixxat_usb_setup_rx_urbs(struct ixxat_usb_device *dev)
+{
+ int i;
+ int err = 0;
+ const struct ixxat_usb_adapter *adapter = dev->adapter;
+ struct net_device *netdev = dev->netdev;
+ struct usb_device *udev = dev->udev;
+
+ for (i = 0; i < IXXAT_USB_MAX_RX_URBS; i++) {
+ struct urb *urb;
+ u8 *buf;
+
+ urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!urb) {
+ err = -ENOMEM;
+ netdev_err(netdev, "No memory for URBs: %pe\n",
+ ERR_PTR(err));
+ break;
+ }
+
+ buf = kmalloc(adapter->buffer_size_rx, GFP_KERNEL);
+ if (!buf) {
+ usb_free_urb(urb);
+ err = -ENOMEM;
+ netdev_err(netdev,
+ "No memory for USB-buffer: %pe\n", ERR_PTR(err));
+ break;
+ }
+
+ usb_fill_bulk_urb(urb, udev,
+ usb_rcvbulkpipe(udev, dev->ep_msg_in), buf,
+ adapter->buffer_size_rx,
+ ixxat_usb_read_bulk_callback, dev);
+
+ urb->transfer_flags |= URB_FREE_BUFFER;
+ usb_anchor_urb(urb, &dev->rx_submitted);
+
+ err = usb_submit_urb(urb, GFP_KERNEL);
+ if (err) {
+ usb_unanchor_urb(urb);
+ kfree(buf);
+ usb_free_urb(urb);
+
+ if (err == -ENODEV)
+ netif_device_detach(netdev);
+
+ break;
+ }
+
+ usb_free_urb(urb);
+ }
+
+ if (i == 0)
+ netdev_err(netdev, "Couldn't setup any rx-URBs\n");
+
+ return err;
+}
+
+static int ixxat_usb_setup_tx_urbs(struct ixxat_usb_device *dev)
+{
+ int i;
+ int ret = 0;
+ const struct ixxat_usb_adapter *adapter = dev->adapter;
+ struct net_device *netdev = dev->netdev;
+ struct usb_device *udev = dev->udev;
+
+ for (i = 0; i < IXXAT_USB_MAX_TX_URBS; i++) {
+ struct ixxat_tx_urb_context *context;
+ struct urb *urb;
+ u8 *buf;
+
+ urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!urb) {
+ ret = -ENOMEM;
+ netdev_err(netdev, "No memory for URBs: %pe\n",
+ ERR_PTR(ret));
+ break;
+ }
+
+ buf = kmalloc(adapter->buffer_size_tx, GFP_KERNEL);
+ if (!buf) {
+ usb_free_urb(urb);
+ ret = -ENOMEM;
+ netdev_err(netdev,
+ "No memory for USB-buffer: %pe\n", ERR_PTR(ret));
+ break;
+ }
+
+ context = dev->tx_contexts + i;
+ context->dev = dev;
+ context->urb = urb;
+
+ usb_fill_bulk_urb(urb, udev,
+ usb_sndbulkpipe(udev, dev->ep_msg_out), buf,
+ adapter->buffer_size_tx,
+ ixxat_usb_write_bulk_callback, context);
+
+ urb->transfer_flags |= URB_FREE_BUFFER;
+ }
+
+ if (i == 0) {
+ netdev_err(netdev, "Couldn't setup any tx-URBs\n");
+ usb_kill_anchored_urbs(&dev->rx_submitted);
+ }
+
+ return ret;
+}
+
+static void ixxat_usb_disconnect(struct usb_interface *intf)
+{
+ struct ixxat_usb_device *dev;
+ struct ixxat_usb_device *prev_dev;
+
+ /* unregister the given device and all previous devices */
+ for (dev = usb_get_intfdata(intf); dev; dev = prev_dev) {
+ prev_dev = dev->prev_dev;
+ unregister_netdev(dev->netdev);
+ free_candev(dev->netdev);
+ }
+
+ usb_set_intfdata(intf, NULL);
+}
+
+static int ixxat_usb_start(struct ixxat_usb_device *dev)
+{
+ int err;
+ int i;
+ u32 time_ref = 0;
+ const struct ixxat_usb_adapter *adapter = dev->adapter;
+
+ err = ixxat_usb_setup_rx_urbs(dev);
+ if (err)
+ return err;
+
+ err = ixxat_usb_setup_tx_urbs(dev);
+ if (err)
+ return err;
+
+ /* Try to reset the controller, in case it is already initialized
+ * from a previous unclean shutdown
+ */
+ ixxat_usb_reset_ctrl(dev);
+
+ if (adapter->init_ctrl) {
+ err = adapter->init_ctrl(dev);
+ if (err)
+ goto fail;
+ }
+
+ if (!(dev->state & IXXAT_USB_STATE_STARTED)) {
+ err = ixxat_usb_start_ctrl(dev, &time_ref);
+ if (err)
+ goto fail;
+
+ ixxat_usb_set_ts_now(dev, time_ref);
+ }
+
+ dev->bec.txerr = 0;
+ dev->bec.rxerr = 0;
+
+ dev->state |= IXXAT_USB_STATE_STARTED;
+ dev->can.state = CAN_STATE_ERROR_ACTIVE;
+ return 0;
+
+fail:
+ if (err == -ENODEV)
+ netif_device_detach(dev->netdev);
+
+ netdev_err(dev->netdev, "Couldn't submit control: %pe\n", ERR_PTR(err));
+
+ for (i = 0; i < IXXAT_USB_MAX_TX_URBS; i++) {
+ usb_free_urb(dev->tx_contexts[i].urb);
+ dev->tx_contexts[i].urb = NULL;
+ }
+
+ return err;
+}
+
+static int ixxat_usb_open(struct net_device *netdev)
+{
+ struct ixxat_usb_device *dev = netdev_priv(netdev);
+ int err;
+
+ /* common open */
+ err = open_candev(netdev);
+ if (err)
+ goto fail;
+
+ /* finally start device */
+ err = ixxat_usb_start(dev);
+ if (err) {
+ netdev_err(netdev, "Couldn't start device: %pe\n", ERR_PTR(err));
+ close_candev(netdev);
+ goto fail;
+ }
+
+ netif_start_queue(netdev);
+
+fail:
+ return err;
+}
+
+static int ixxat_usb_stop(struct net_device *netdev)
+{
+ int err = 0;
+ struct ixxat_usb_device *dev = netdev_priv(netdev);
+
+ ixxat_usb_stop_queue(dev);
+ if (dev->state & IXXAT_USB_STATE_STARTED) {
+ err = ixxat_usb_stop_ctrl(dev);
+ if (err)
+ netdev_warn(netdev, "Error %d: Cannot stop device\n",
+ err);
+ }
+
+ dev->state &= ~IXXAT_USB_STATE_STARTED;
+ close_candev(netdev);
+ dev->can.state = CAN_STATE_STOPPED;
+ return err;
+}
+
+static const struct net_device_ops ixxat_usb_netdev_ops = {
+ .ndo_open = ixxat_usb_open,
+ .ndo_stop = ixxat_usb_stop,
+ .ndo_start_xmit = ixxat_usb_start_xmit
+};
+
+static const struct ethtool_ops ixxat_usb_ethtool_ops = {
+ .get_ts_info = ethtool_op_get_ts_info,
+};
+
+static int ixxat_usb_create_dev(struct usb_interface *intf,
+ const struct ixxat_usb_adapter *adapter,
+ u16 ctrl_index)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ struct ixxat_usb_device *dev;
+ struct net_device *netdev;
+ int err;
+ int i;
+
+ netdev = alloc_candev(sizeof(*dev), IXXAT_USB_MAX_TX_URBS);
+ if (!netdev) {
+ dev_err(&intf->dev, "Cannot allocate candev\n");
+ return -ENOMEM;
+ }
+
+ dev = netdev_priv(netdev);
+ dev->udev = udev;
+ dev->netdev = netdev;
+ dev->adapter = adapter;
+ dev->ctrl_index = ctrl_index;
+ dev->state = IXXAT_USB_STATE_CONNECTED;
+
+ i = ctrl_index + adapter->ep_offs;
+ dev->ep_msg_in = adapter->ep_msg_in[i];
+ dev->ep_msg_out = adapter->ep_msg_out[i];
+
+ dev->can.clock.freq = adapter->clock;
+ dev->can.bittiming_const = adapter->bt;
+ dev->can.data_bittiming_const = adapter->btd;
+
+ dev->can.do_set_mode = ixxat_usb_set_mode;
+ dev->can.do_get_berr_counter = ixxat_usb_get_berr_counter;
+
+ dev->can.ctrlmode_supported = adapter->modes;
+
+ netdev->netdev_ops = &ixxat_usb_netdev_ops;
+ netdev->ethtool_ops = &ixxat_usb_ethtool_ops;
+
+ netdev->flags |= IFF_ECHO;
+ netdev->dev_port = ctrl_index;
+
+ init_usb_anchor(&dev->rx_submitted);
+ init_usb_anchor(&dev->tx_submitted);
+
+ atomic_set(&dev->active_tx_urbs, 0);
+
+ for (i = 0; i < IXXAT_USB_MAX_TX_URBS; i++)
+ dev->tx_contexts[i].echo_index = IXXAT_USB_MAX_TX_URBS;
+
+ dev->prev_dev = usb_get_intfdata(intf);
+ usb_set_intfdata(intf, dev);
+
+ SET_NETDEV_DEV(netdev, &intf->dev);
+ err = register_candev(netdev);
+ if (err) {
+ dev_err(&intf->dev, "Failed to register can device: %pe\n",
+ ERR_PTR(err));
+ goto free_candev;
+ }
+
+ if (dev->prev_dev)
+ (dev->prev_dev)->next_dev = dev;
+
+ err = ixxat_usb_get_dev_info(udev, &dev->dev_info);
+ if (err) {
+ dev_err(&intf->dev,
+ "Failed to get device information: %pe\n", ERR_PTR(err));
+ goto unreg_candev;
+ }
+
+ netdev_info(netdev, "%s: Connected Channel %u (device %s)\n",
+ dev->dev_info.device_name, ctrl_index,
+ dev->dev_info.device_id);
+
+ return 0;
+
+unreg_candev:
+ unregister_candev(netdev);
+free_candev:
+ usb_set_intfdata(intf, dev->prev_dev);
+ free_candev(netdev);
+ return err;
+}
+
+static int ixxat_usb_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ struct usb_host_interface *host_intf = intf->altsetting;
+ const struct ixxat_usb_adapter *adapter;
+ struct ixxat_dev_caps dev_caps;
+ u16 i;
+ int err;
+
+ usb_reset_configuration(udev);
+
+ adapter = (const struct ixxat_usb_adapter *)id->driver_info;
+
+ for (i = 0; i < host_intf->desc.bNumEndpoints; i++) {
+ const u8 epaddr = host_intf->endpoint[i].desc.bEndpointAddress;
+ int match;
+ u8 j;
+
+ /* Check if usb-endpoint address matches known usb-endpoints */
+ for (j = 0; j < IXXAT_USB_MAX_CHANNEL; j++) {
+ u8 ep_msg_in = adapter->ep_msg_in[j];
+ u8 ep_msg_out = adapter->ep_msg_out[j];
+
+ if (epaddr == ep_msg_in || epaddr == ep_msg_out) {
+ match = 1;
+ break;
+ }
+ }
+
+ if (!match)
+ return -ENODEV;
+ }
+
+ err = ixxat_usb_power_ctrl(udev, IXXAT_USB_POWER_WAKEUP);
+ if (err)
+ return err;
+
+ msleep(IXXAT_USB_POWER_WAKEUP_TIME);
+
+ err = ixxat_usb_get_dev_caps(udev, &dev_caps);
+ if (err) {
+ dev_err(&intf->dev,
+ "Failed to get device capabilities: %pe\n", ERR_PTR(err));
+ return err;
+ }
+
+ err = -ENODEV;
+ for (i = 0; i < le16_to_cpu(dev_caps.bus_ctrl_count); i++) {
+ u16 dev_bustype = le16_to_cpu(dev_caps.bus_ctrl_types[i]);
+ u8 bustype = FIELD_GET(IXXAT_USB_BUS_TYPE_MASK, dev_bustype);
+
+ if (bustype == IXXAT_USB_BUS_CAN)
+ err = ixxat_usb_create_dev(intf, adapter, i);
+
+ if (err) {
+ /* deregister already created devices */
+ ixxat_usb_disconnect(intf);
+ return err;
+ }
+ }
+
+ return err;
+}
+
+static struct usb_driver ixxat_usb_driver = {
+ .name = KBUILD_MODNAME,
+ .probe = ixxat_usb_probe,
+ .disconnect = ixxat_usb_disconnect,
+ .id_table = ixxat_usb_table,
+};
+
+module_usb_driver(ixxat_usb_driver);
diff --git a/drivers/net/can/usb/ixxat_usb/ixxat_usb_core.h b/drivers/net/can/usb/ixxat_usb/ixxat_usb_core.h
new file mode 100644
index 000000000000..a6ea6d682282
--- /dev/null
+++ b/drivers/net/can/usb/ixxat_usb/ixxat_usb_core.h
@@ -0,0 +1,509 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2018 HMS Industrial Networks <socketcan@xxxxxxxxxxxxxxx>
+ */
+
+#ifndef IXXAT_USB_CORE_H
+#define IXXAT_USB_CORE_H
+
+#define IXXAT_USB_CTRL_NAME "ixxat_usb"
+
+#define IXXAT_USB_VENDOR_ID 0x08d8
+
+/* supported device ids: CL1 */
+#define USB2CAN_COMPACT_PRODUCT_ID 0x0008
+#define USB2CAN_EMBEDDED_PRODUCT_ID 0x0009
+#define USB2CAN_PROFESSIONAL_PRODUCT_ID 0x000A
+#define USB2CAN_AUTOMOTIVE_PRODUCT_ID 0x000B
+
+/* supported device ids: CL2 */
+#define USB2CAN_FD_COMPACT_PRODUCT_ID 0x0014
+#define USB2CAN_FD_PROFESSIONAL_PRODUCT_ID 0x0016
+#define USB2CAN_FD_AUTOMOTIVE_PRODUCT_ID 0x0017
+#define USB2CAN_FD_PCIE_MINI_PRODUCT_ID 0x001B
+#define USB2CAR_PRODUCT_ID 0x001C
+#define CAN_IDM101_PRODUCT_ID 0xFF12
+#define CAN_IDM200_PRODUCT_ID 0xFF13
+
+#define IXXAT_USB_BUS_CAN 1
+
+#define IXXAT_USB_BUS_TYPE_MASK 0xff00
+
+#define IXXAT_USB_STATE_CONNECTED BIT(0)
+#define IXXAT_USB_STATE_STARTED BIT(1)
+
+#define IXXAT_USB_MAX_CHANNEL 5
+#define IXXAT_USB_MAX_TYPES 32
+#define IXXAT_USB_MAX_RX_URBS 4
+#define IXXAT_USB_MAX_TX_URBS 10
+#define IXXAT_USB_MAX_COM_REQ 10
+
+#define IXXAT_USB_MSG_TIMEOUT 50
+#define IXXAT_USB_MSG_CYCLE 20
+
+#define IXXAT_USB_POWER_WAKEUP 0
+#define IXXAT_USB_POWER_WAKEUP_TIME 500
+
+#define IXXAT_USB_OPMODE_STANDARD BIT(0)
+#define IXXAT_USB_OPMODE_EXTENDED BIT(1)
+#define IXXAT_USB_OPMODE_ERRFRAME BIT(2)
+#define IXXAT_USB_OPMODE_LISTONLY BIT(3)
+
+#define IXXAT_USB_EXMODE_EXTDATA BIT(0)
+#define IXXAT_USB_EXMODE_FASTDATA BIT(1)
+#define IXXAT_USB_EXMODE_ISOFD BIT(2)
+
+#define IXXAT_USB_BTMODE_NAT BIT(0)
+#define IXXAT_USB_BTMODE_TSM BIT(1)
+
+#define IXXAT_USB_STOP_ACTION_CLEARALL 3
+
+#define IXXAT_RESTART_TASK_CYCLE_TIME 20
+
+#define IXXAT_USB_CAN_DATA 0x00
+#define IXXAT_USB_CAN_INFO 0x01
+#define IXXAT_USB_CAN_ERROR 0x02
+#define IXXAT_USB_CAN_STATUS 0x03
+#define IXXAT_USB_CAN_WAKEUP 0x04
+#define IXXAT_USB_CAN_TIMEOVR 0x05
+#define IXXAT_USB_CAN_TIMERST 0x06
+
+#define IXXAT_USB_CAN_STATUS_OK 0x00000000
+#define IXXAT_USB_CAN_STATUS_OVERRUN 0x00000002
+#define IXXAT_USB_CAN_STATUS_ERRLIM 0x00000004
+#define IXXAT_USB_CAN_STATUS_BUSOFF 0x00000008
+#define IXXAT_USB_CAN_STATUS_ERR_PAS 0x00002000
+
+#define IXXAT_USB_CAN_ERROR_LEN 5
+
+#define IXXAT_USB_CAN_ERROR_CODE 0
+#define IXXAT_USB_CAN_ERROR_COUNTER_RX 3
+#define IXXAT_USB_CAN_ERROR_COUNTER_TX 4
+
+#define IXXAT_USB_CAN_ERROR_STUFF 1
+#define IXXAT_USB_CAN_ERROR_FORM 2
+#define IXXAT_USB_CAN_ERROR_ACK 3
+#define IXXAT_USB_CAN_ERROR_BIT 4
+#define IXXAT_USB_CAN_ERROR_CRC 6
+
+#define IXXAT_USB_MSG_FLAGS_TYPE 0x000000FF
+#define IXXAT_USB_MSG_FLAGS_DLC 0x000F0000
+#define IXXAT_USB_MSG_FLAGS_OVR 0x00100000
+#define IXXAT_USB_MSG_FLAGS_RTR 0x00400000
+#define IXXAT_USB_MSG_FLAGS_EXT 0x00800000
+
+#define IXXAT_USB_FDMSG_FLAGS_EDL 0x00000400
+#define IXXAT_USB_FDMSG_FLAGS_FDR 0x00000800
+#define IXXAT_USB_FDMSG_FLAGS_ESI 0x00001000
+
+#define IXXAT_USB_CAN_CMD_START 0x326
+#define IXXAT_USB_CAN_CMD_STOP 0x327
+#define IXXAT_USB_CAN_CMD_RESET 0x328
+
+#define IXXAT_USB_BRD_CMD_GET_DEVCAPS 0x401
+#define IXXAT_USB_BRD_CMD_GET_DEVINFO 0x402
+#define IXXAT_USB_BRD_CMD_POWER 0x421
+
+#define IXXAT_USB_REQ_SIZE(cmd) (sizeof(*cmd) - sizeof(cmd->res))
+#define IXXAT_USB_RES_SIZE(cmd) (sizeof(*cmd) - sizeof(cmd->req))
+
+/**
+ * struct ixxat_can_msg_base - IXXAT CAN message base (CL1/CL2)
+ * @size: Message size (this field excluded)
+ * @time: Message timestamp
+ * @msg_id: Message ID
+ * @flags: Message flags
+ *
+ * Contains the common fields of an IXXAT CAN message on both CL1 and CL2
+ * devices
+ */
+struct ixxat_can_msg_base {
+ u8 size;
+ __le32 time;
+ __le32 msg_id;
+ __le32 flags;
+} __packed;
+
+/**
+ * struct ixxat_can_msg_cl1 - IXXAT CAN message (CL1)
+ * @data: Message data (standard CAN frame)
+ *
+ * Contains the fields of an IXXAT CAN message on CL1 devices
+ */
+struct ixxat_can_msg_cl1 {
+ union {
+ u8 data[CAN_MAX_DLEN];
+ __le32 status;
+ } __packed;
+} __packed;
+
+/**
+ * struct ixxat_can_msg_cl2 - IXXAT CAN message (CL2)
+ * @client_id: Client ID
+ * @data: Message data (CAN FD frame)
+ *
+ * Contains the fields of an IXXAT CAN message on CL2 devices
+ */
+struct ixxat_can_msg_cl2 {
+ __le32 client_id;
+ union {
+ u8 data[CANFD_MAX_DLEN];
+ __le32 status;
+ } __packed;
+} __packed;
+
+/**
+ * struct ixxat_can_msg - IXXAT CAN message
+ * @base: Base message
+ * @cl1: Cl1 message
+ * @cl2: Cl2 message
+ *
+ * Contains an IXXAT CAN message
+ */
+struct ixxat_can_msg {
+ struct ixxat_can_msg_base base;
+ union {
+ struct ixxat_can_msg_cl1 cl1;
+ struct ixxat_can_msg_cl2 cl2;
+ };
+} __packed;
+
+/**
+ * struct ixxat_dev_caps - Device capabilities
+ * @bus_ctrl_count: Stores the bus controller counter
+ * @bus_ctrl_types: Stores the bus controller types
+ *
+ * Contains the device capabilities
+ */
+struct ixxat_dev_caps {
+ __le16 bus_ctrl_count;
+ __le16 bus_ctrl_types[IXXAT_USB_MAX_TYPES];
+} __packed;
+
+/**
+ * struct ixxat_canbtp Bittiming parameters (CL2)
+ * @mode: Operation mode
+ * @bps: Bits per second
+ * @ts1: First time segment
+ * @ts2: Second time segment
+ * @sjw: Synchronization jump width
+ * @tdo: Transmitter delay offset
+ *
+ * Bittiming parameters of a CL2 initialization request
+ */
+struct ixxat_canbtp {
+ __le32 mode;
+ __le32 bps;
+ __le16 ts1;
+ __le16 ts2;
+ __le16 sjw;
+ __le16 tdo;
+} __packed;
+
+/**
+ * struct ixxat_dev_info IXXAT usb device information
+ * @device_name: Name of the device
+ * @device_id: Device identification ( unique device id)
+ * @device_version: Device version ( 0, 1, ...)
+ * @device_fpga_version: Version of FPGA design
+ *
+ * Contains device information of IXXAT USB devices
+ */
+struct ixxat_dev_info {
+ char device_name[16];
+ char device_id[16];
+ __le16 device_version;
+ __le32 device_fpga_version;
+} __packed;
+
+/**
+ * struct ixxat_time_ref Time reference
+ * @kt_host_0: Latest time on the host
+ * @ts_dev_0: Latest time stamp on the device
+ * @ts_dev_last: Last device time stamp
+ *
+ * Contains time references of the device and the host
+ */
+struct ixxat_time_ref {
+ ktime_t kt_host_0;
+ u32 ts_dev_0;
+ u32 ts_dev_last;
+};
+
+/**
+ * struct ixxat_tx_urb_context URB content for transmission
+ * @dev: IXXAT USB device
+ * @urb: USB request block
+ * @echo_index: Echo index
+ *
+ * Contains content for USB request block transmissions
+ */
+struct ixxat_tx_urb_context {
+ struct ixxat_usb_device *dev;
+ struct urb *urb;
+ u32 echo_index;
+};
+
+/**
+ * struct ixxat_usb_device IXXAT USB device
+ * @can: CAN common private data
+ * @adapter: USB network descriptor
+ * @udev: USB device
+ * @netdev: Net_device
+ * @active_tx_urbs: Active tx urbs
+ * @tx_submitted: Submitted tx usb anchor
+ * @tx_contexts: Buffer for tx contexts
+ * @rx_submitted: Submitted rx usb anchor
+ * @state: Device state
+ * @ctrl_index: Controller index
+ * @ep_msg_in: USB endpoint for incoming messages
+ * @ep_msg_out: USB endpoint for outgoing messages
+ * @prev_dev: Previous opened device
+ * @next_dev: Next opened device in list
+ * @time_ref: Time reference
+ * @dev_info: Device information
+ * @bec: CAN error counter
+ *
+ * IXXAT USB-to-CAN device
+ */
+struct ixxat_usb_device {
+ struct can_priv can;
+ const struct ixxat_usb_adapter *adapter;
+ struct usb_device *udev;
+ struct net_device *netdev;
+
+ atomic_t active_tx_urbs;
+ struct usb_anchor tx_submitted;
+ struct ixxat_tx_urb_context tx_contexts[IXXAT_USB_MAX_TX_URBS];
+ struct usb_anchor rx_submitted;
+
+ u32 state;
+ u16 ctrl_index;
+
+ u8 ep_msg_in;
+ u8 ep_msg_out;
+
+ struct ixxat_usb_device *prev_dev;
+ struct ixxat_usb_device *next_dev;
+
+ struct ixxat_time_ref time_ref;
+ struct ixxat_dev_info dev_info;
+
+ struct can_berr_counter bec;
+};
+
+/**
+ * struct ixxat_usb_dal_req IXXAT device request block
+ * @size: Request size
+ * @port: Request port
+ * @socket: Request socket
+ * @code: Request code
+ *
+ * IXXAT device request block
+ */
+struct ixxat_usb_dal_req {
+ __le32 size;
+ __le16 port;
+ __le16 socket;
+ __le32 code;
+} __packed;
+
+/**
+ * struct ixxat_usb_dal_res IXXAT device response block
+ * @res_size: Expected response size
+ * @ret_size: Actual response size
+ * @code: Return code
+ *
+ * IXXAT device response block
+ */
+struct ixxat_usb_dal_res {
+ __le32 res_size;
+ __le32 ret_size;
+ __le32 code;
+} __packed;
+
+/**
+ * struct ixxat_usb_dal_cmd IXXAT device command
+ * @req: Request block
+ * @req: Response block
+ *
+ * IXXAT device command
+ */
+struct ixxat_usb_dal_cmd {
+ struct ixxat_usb_dal_req req;
+ struct ixxat_usb_dal_res res;
+} __packed;
+
+/**
+ * struct ixxat_usb_caps_cmd Device capabilities command
+ * @req: Request block
+ * @res: Response block
+ * @caps: Device capabilities
+ *
+ * Can be sent to a device to request its capabilities
+ */
+struct ixxat_usb_caps_cmd {
+ struct ixxat_usb_dal_req req;
+ struct ixxat_usb_dal_res res;
+ struct ixxat_dev_caps caps;
+} __packed;
+
+/**
+ * struct ixxat_usb_init_cl1_cmd Initialization command (CL1)
+ * @req: Request block
+ * @mode: Operation mode
+ * @btr0: Bittiming register 0
+ * @btr1: Bittiming register 1
+ * @padding: 1 byte padding
+ * @res: Response block
+ *
+ * Can be sent to a CL1 device to initialize it
+ */
+struct ixxat_usb_init_cl1_cmd {
+ struct ixxat_usb_dal_req req;
+ u8 mode;
+ u8 btr0;
+ u8 btr1;
+ u8 padding;
+ struct ixxat_usb_dal_res res;
+} __packed;
+
+/**
+ * struct ixxat_usb_init_cl2_cmd Initialization command (CL2)
+ * @req: Request block
+ * @opmode: Operation mode
+ * @exmode: Extended mode
+ * @sdr: Stadard bittiming parameters
+ * @fdr: Fast data bittiming parameters
+ * @_padding: 2 bytes padding
+ * @res: Response block
+ *
+ * Can be sent to a CL2 device to initialize it
+ */
+struct ixxat_usb_init_cl2_cmd {
+ struct ixxat_usb_dal_req req;
+ u8 opmode;
+ u8 exmode;
+ struct ixxat_canbtp sdr;
+ struct ixxat_canbtp fdr;
+ __le16 _padding;
+ struct ixxat_usb_dal_res res;
+} __packed;
+
+/**
+ * struct ixxat_usb_start_cmd Controller start command
+ * @req: Request block
+ * @res: Response block
+ * @time: Timestamp
+ *
+ * Can be sent to a device to start its controller
+ */
+struct ixxat_usb_start_cmd {
+ struct ixxat_usb_dal_req req;
+ struct ixxat_usb_dal_res res;
+ __le32 time;
+} __packed;
+
+/**
+ * struct ixxat_usb_stop_cmd Controller stop command
+ * @req: Request block
+ * @action: Stop action
+ * @res: Response block
+ *
+ * Can be sent to a device to start its controller
+ */
+struct ixxat_usb_stop_cmd {
+ struct ixxat_usb_dal_req req;
+ __le32 action;
+ struct ixxat_usb_dal_res res;
+} __packed;
+
+/**
+ * struct ixxat_usb_power_cmd Power command
+ * @req: Request block
+ * @mode: Power mode
+ * @_padding: 3 byte padding
+ * @res: Response block
+ *
+ * Can be sent to a device to set its power mode
+ */
+struct ixxat_usb_power_cmd {
+ struct ixxat_usb_dal_req req;
+ u8 mode;
+ u8 _padding[3];
+ struct ixxat_usb_dal_res res;
+} __packed;
+
+/**
+ * struct ixxat_usb_info_cmd Device information command
+ * @req: Request block
+ * @res: Response block
+ * @info: Device information
+ *
+ * Can be sent to a device to request its device information
+ */
+struct ixxat_usb_info_cmd {
+ struct ixxat_usb_dal_req req;
+ struct ixxat_usb_dal_res res;
+ struct ixxat_dev_info info;
+} __packed;
+
+/**
+ * struct ixxat_usb_adapter IXXAT USB device adapter
+ * @clock: Clock frequency
+ * @bt: Bittiming constants
+ * @btd: Data bittiming constants
+ * @modes: Supported modes
+ * @buffer_size_rx: Buffer size for receiving
+ * @buffer_size_tx: Buffer size for transfer
+ * @ep_msg_in: USB endpoint buffer for incoming messages
+ * @ep_msg_out: USB endpoint buffer for outgoing messages
+ * @ep_offs: Endpoint offset (device depended)
+ *
+ * Device Adapter for IXXAT USB devices
+ */
+struct ixxat_usb_adapter {
+ const u32 clock;
+ const struct can_bittiming_const *bt;
+ const struct can_bittiming_const *btd;
+ const u32 modes;
+ const u16 buffer_size_rx;
+ const u16 buffer_size_tx;
+ const u8 ep_msg_in[IXXAT_USB_MAX_CHANNEL];
+ const u8 ep_msg_out[IXXAT_USB_MAX_CHANNEL];
+ const u8 ep_offs;
+ int (*init_ctrl)(struct ixxat_usb_device *dev);
+};
+
+extern const struct ixxat_usb_adapter usb2can_cl1;
+extern const struct ixxat_usb_adapter usb2can_cl2;
+extern const struct ixxat_usb_adapter can_idm;
+
+/**
+ * ixxat_usb_setup_cmd() - Setup a device command
+ * @req: Request block
+ * @res: Response block
+ *
+ * This function sets the default values in the request and the response block
+ * of a device command
+ */
+void ixxat_usb_setup_cmd(struct ixxat_usb_dal_req *req,
+ struct ixxat_usb_dal_res *res);
+
+/**
+ * ixxat_usb_send_cmd() - Send a command to the device
+ * @dev: USB device
+ * @port: Command port
+ * @req: Command request buffer
+ * @req_size: Command request size
+ * @res: Command response buffer
+ * @res_size: Command response size
+ *
+ * This function sends a specific command to the device
+ *
+ * Return: Negative error code or zero on success
+ */
+int ixxat_usb_send_cmd(struct usb_device *dev, const u16 port, void * const req,
+ const u16 req_size, void *res, const u16 res_size);
+
+#endif /* IXXAT_USB_CORE_H */
--
2.41.0
