[PATCH 3/3] USB: cdc-acm - blacklist IMS PCU device
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Date: 2013-02-18 19:06:14
Subsystem:
the rest, usb acm driver, usb subsystem · Maintainers:
Linus Torvalds, Oliver Neukum, Greg Kroah-Hartman
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@gmail.com> --- 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
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1.7.11.7