In order to support an older USB cradle by Denso, I added its vendor- and
product-ID to the array of usb_device_id acm_ids. In this way cdc-acm feels
responsible for this cradle. The related /dev/ttyACM node is being created
properly, and the data transfer works.
However, later cradle models by Denso do have proper descriptors, so the patch
is not required for these. At the same time both the older and the later model
have the same vendor- and product-ID, but they both work with the patched
driver.
Declaration of the Denso cradles I tested:
- both models have the same IDs: vendorID 0x076d, productID 0x0006
- older model: Denso CU-321 (descriptors not properly set)
- later model: Denso CU-821 (with proper descriptors)
Signed-off-by: Bjoern Gerhart <o...@airbjorn.de>
---
drivers/usb/class/cdc-acm.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 546a17e..d5a4140 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1654,6 +1654,8 @@ static int acm_reset_resume(struct usb_interface *intf)
static const struct usb_device_id acm_ids[] = {
/* quirky and broken devices */
+ { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
+ .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
{ USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
.driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
{ USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
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