can: peak: Add support for PCAN-USB X6 USB interface

This adds support for PEAK-System PCAN-USB X6 USB to CAN interface.

The CAN FD adapter PCAN-USB X6 allows the connection of up to 6 CAN FD
or CAN networks to a computer via USB. The interface is installed in an
aluminum profile casing and is shipped in versions with D-Sub connectors
or M12 circular connectors.

The PCAN-USB X6 registers in the USB sub-system as if 3x PCAN-USB-Pro FD
adapters were plugged. So, this patch:

- updates the PEAK_USB entry of the corresponding Kconfig file
- defines and adds the device id. of the PCAN-USB X6 (0x0014) into the
  table of supported device ids
- defines and adds the new software structure implementing the PCAN-USB X6,
  which is obviously a clone of the software structure implementing the
  PCAN-USB Pro FD.

Signed-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Tested-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

3 files changed, 76 insertions, 0 deletions

diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_core.c b/drivers/net/can/usb/peak_usb/pcan_usb_core.c
index c06382cdfdfe..f3141ca56bc3 100644
--- a/drivers/net/can/usb/peak_usb/pcan_usb_core.c
+++ b/drivers/net/can/usb/peak_usb/pcan_usb_core.c
@@ -39,6 +39,7 @@ static struct usb_device_id peak_usb_table[] = {
         {USB_DEVICE(PCAN_USB_VENDOR_ID, PCAN_USBPRO_PRODUCT_ID)},
         {USB_DEVICE(PCAN_USB_VENDOR_ID, PCAN_USBFD_PRODUCT_ID)},
         {USB_DEVICE(PCAN_USB_VENDOR_ID, PCAN_USBPROFD_PRODUCT_ID)},
+        {USB_DEVICE(PCAN_USB_VENDOR_ID, PCAN_USBX6_PRODUCT_ID)},
         {} /* Terminating entry */
 };
 
@@ -50,6 +51,7 @@ static const struct peak_usb_adapter *const peak_usb_adapters_list[] = {
         &pcan_usb_pro,
         &pcan_usb_fd,
         &pcan_usb_pro_fd,
+        &pcan_usb_x6,
 };
 
 /*
diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_core.h b/drivers/net/can/usb/peak_usb/pcan_usb_core.h
index 506fe506c9d3..3cbfb069893d 100644
--- a/drivers/net/can/usb/peak_usb/pcan_usb_core.h
+++ b/drivers/net/can/usb/peak_usb/pcan_usb_core.h
@@ -27,6 +27,7 @@
 #define PCAN_USBPRO_PRODUCT_ID          0x000d
 #define PCAN_USBPROFD_PRODUCT_ID        0x0011
 #define PCAN_USBFD_PRODUCT_ID           0x0012
+#define PCAN_USBX6_PRODUCT_ID           0x0014
 
 #define PCAN_USB_DRIVER_NAME            "peak_usb"
 
@@ -90,6 +91,7 @@ extern const struct peak_usb_adapter pcan_usb;
 extern const struct peak_usb_adapter pcan_usb_pro;
 extern const struct peak_usb_adapter pcan_usb_fd;
 extern const struct peak_usb_adapter pcan_usb_pro_fd;
+extern const struct peak_usb_adapter pcan_usb_x6;
 
 struct peak_time_ref {
         struct timeval tv_host_0, tv_host;
diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_fd.c b/drivers/net/can/usb/peak_usb/pcan_usb_fd.c
index 8a316a194cf7..304732550f0a 100644
--- a/drivers/net/can/usb/peak_usb/pcan_usb_fd.c
+++ b/drivers/net/can/usb/peak_usb/pcan_usb_fd.c
@@ -1132,3 +1132,75 @@ const struct peak_usb_adapter pcan_usb_pro_fd = {
 
         .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
 };
+
+/* describes the PCAN-USB X6 adapter */
+static const struct can_bittiming_const pcan_usb_x6_const = {
+        .name = "pcan_usb_x6",
+        .tseg1_min = 1,
+        .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
+        .tseg2_min = 1,
+        .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
+        .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
+        .brp_min = 1,
+        .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
+        .brp_inc = 1,
+};
+
+static const struct can_bittiming_const pcan_usb_x6_data_const = {
+        .name = "pcan_usb_x6",
+        .tseg1_min = 1,
+        .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
+        .tseg2_min = 1,
+        .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
+        .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
+        .brp_min = 1,
+        .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
+        .brp_inc = 1,
+};
+
+const struct peak_usb_adapter pcan_usb_x6 = {
+        .name = "PCAN-USB X6",
+        .device_id = PCAN_USBX6_PRODUCT_ID,
+        .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
+        .ctrlmode_supported = CAN_CTRLMODE_FD |
+                        CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
+        .clock = {
+                .freq = PCAN_UFD_CRYSTAL_HZ,
+        },
+        .bittiming_const = &pcan_usb_x6_const,
+        .data_bittiming_const = &pcan_usb_x6_data_const,
+
+        /* size of device private data */
+        .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
+
+        /* timestamps usage */
+        .ts_used_bits = 32,
+        .ts_period = 1000000, /* calibration period in ts. */
+        .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
+        .us_per_ts_shift = 0,
+
+        /* give here messages in/out endpoints */
+        .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
+        .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
+
+        /* size of rx/tx usb buffers */
+        .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
+        .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
+
+        /* device callbacks */
+        .intf_probe = pcan_usb_pro_probe,       /* same as PCAN-USB Pro */
+        .dev_init = pcan_usb_fd_init,
+
+        .dev_exit = pcan_usb_fd_exit,
+        .dev_free = pcan_usb_fd_free,
+        .dev_set_bus = pcan_usb_fd_set_bus,
+        .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
+        .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
+        .dev_decode_buf = pcan_usb_fd_decode_buf,
+        .dev_start = pcan_usb_fd_start,
+        .dev_stop = pcan_usb_fd_stop,
+        .dev_restart_async = pcan_usb_fd_restart_async,
+        .dev_encode_msg = pcan_usb_fd_encode_msg,
+
+        .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
+};