The IMS PCU (Passenger Control Unit) device used custom protocol over serial
line, so it is presenting itself as CDC ACM device.
Now that we have proper in-kernel driver for it we need to black-list the
device in cdc-acm driver.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
---
drivers/usb/class/cdc-acm.c | 13 +++++++++++++
drivers/usb/class/cdc-acm.h | 1 +
2 files changed, 14 insertions(+)
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 2d92cce..3c8473d 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -987,6 +987,10 @@ static int acm_probe(struct usb_interface *intf,
/* normal quirks */
quirks = (unsigned long)id->driver_info;
+
+ if (quirks == IGNORE_DEVICE)
+ return -ENODEV;
+
num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
/* handle quirks deadly to normal probing*/
@@ -1691,6 +1695,15 @@ static const struct usb_device_id acm_ids[] = {
.driver_info = NO_DATA_INTERFACE,
},
+#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
+ { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
+ .driver_info = IGNORE_DEVICE,
+ },
+ { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
+ .driver_info = IGNORE_DEVICE,
+ },
+#endif
+
/* control interfaces without any protocol set */
{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
USB_CDC_PROTO_NONE) },
diff --git a/drivers/usb/class/cdc-acm.h b/drivers/usb/class/cdc-acm.h
index 35ef887..0f76e4a 100644
--- a/drivers/usb/class/cdc-acm.h
+++ b/drivers/usb/class/cdc-acm.h
@@ -128,3 +128,4 @@ struct acm {
#define NO_CAP_LINE 4
#define NOT_A_MODEM 8
#define NO_DATA_INTERFACE 16
+#define IGNORE_DEVICE 32
--
1.7.11.7
--
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