On May 5, 2010, at 9:00 AM, Alan Stern wrote:
> You will have to do some debugging to find out why your driver isn't
> getting suspended.
I enabled VERBOSE_DEBUG in driver.c and I get the following in the log when I attach my device.
(The messages saying "Skipping management interface", "Using management interface interrupt endpoints", and "Taking interrupt endpoint from management interface" are from a hack I have in usb-serial.c).
May 5 11:33:59 localhost kernel: hub 3-0:1.0: debounce: port 3: total 100ms stable 100ms status 0x101
May 5 11:33:59 localhost kernel: ohci_hcd 0000:00:02.0: GetStatus roothub.portstatus [2] = 0x00100103 PRSC PPS PES CCS
May 5 11:33:59 localhost kernel: usb 3-3: new full speed USB device using ohci_hcd and address 2
May 5 11:33:59 localhost kernel: ohci_hcd 0000:00:02.0: GetStatus roothub.portstatus [2] = 0x00100103 PRSC PPS PES CCS
May 5 11:33:59 localhost kernel: usb 3-3: usb_autoresume_device: cnt 1 -> 1
May 5 11:33:59 localhost kernel: usb 3-3: skipped 1 descriptor after configuration
May 5 11:33:59 localhost kernel: usb 3-3: skipped 4 descriptors after interface
May 5 11:33:59 localhost kernel: usb 3-3: udev 2, busnum 3, minor = 257
May 5 11:33:59 localhost kernel: usb 3-3: New USB device found, idVendor=04e2, idProduct=1410
May 5 11:33:59 localhost kernel: usb 3-3: New USB device strings: Mfr=0, Product=0, SerialNumber=0
May 5 11:33:59 localhost kernel: add_power_attributes
May 5 11:33:59 localhost kernel: add_power_attributes 0 rc=0
May 5 11:33:59 localhost kernel: add_power_attributes 1 rc=0
May 5 11:33:59 localhost kernel: add_power_attributes 2 rc=0
May 5 11:33:59 localhost kernel: add_power_attributes 3 rc=0
May 5 11:33:59 localhost kernel: usb 3-3: usb_probe_device
May 5 11:33:59 localhost kernel: usb 3-3: configuration #1 chosen from 1 choice
May 5 11:33:59 localhost kernel: usb 3-3: usb_autoresume_device: cnt 4 -> 1
May 5 11:33:59 localhost kernel: usb 3-3: adding 3-3:1.0 (config #1, interface 0)
May 5 11:33:59 localhost kernel: usbserial_generic 3-3:1.0: usb_probe_interface
May 5 11:33:59 localhost kernel: usbserial_generic 3-3:1.0: usb_probe_interface - got id
May 5 11:33:59 localhost kernel: usb 3-3: usb_autoresume_device: cnt 5 -> 1
May 5 11:33:59 localhost kernel: usb 3-3: usb_autosuspend_device: cnt 4 -> 0
May 5 11:33:59 localhost kernel: exar 3-3:1.0: usb_probe_interface
May 5 11:33:59 localhost kernel: exar 3-3:1.0: usb_probe_interface - got id
May 5 11:33:59 localhost kernel: usb 3-3: usb_autoresume_device: cnt 5 -> 1
May 5 11:33:59 localhost kernel: exar 3-3:1.0: Skipping management interface
May 5 11:33:59 localhost kernel: usb 3-3: usb_autosuspend_device: cnt 4 -> 0
May 5 11:33:59 localhost kernel: usb 3-3: adding 3-3:1.1 (config #1, interface 1)
May 5 11:33:59 localhost kernel: usbserial_generic 3-3:1.1: usb_probe_interface
May 5 11:33:59 localhost kernel: usbserial_generic 3-3:1.1: usb_probe_interface - got id
May 5 11:33:59 localhost kernel: usb 3-3: usb_autoresume_device: cnt 5 -> 1
May 5 11:33:59 localhost kernel: usb 3-3: usb_autosuspend_device: cnt 4 -> 0
May 5 11:33:59 localhost kernel: exar 3-3:1.1: usb_probe_interface
May 5 11:33:59 localhost kernel: exar 3-3:1.1: usb_probe_interface - got id
May 5 11:33:59 localhost kernel: usb 3-3: usb_autoresume_device: cnt 5 -> 1
May 5 11:33:59 localhost kernel: exar 3-3:1.1: Using management interface interrupt endpoints
May 5 11:33:59 localhost kernel: exar 3-3:1.1: Taking interrupt endpoint from management interface
May 5 11:33:59 localhost kernel: exar 3-3:1.1: Exar serial converter detected
May 5 11:33:59 localhost kernel: usb 3-3: exar_attach: 1410
May 5 11:33:59 localhost kernel: usb 3-3: usb_autosuspend_device: cnt 4 -> 0
May 5 11:33:59 localhost kernel: usb 3-3: Exar serial converter now attached to ttyUSB0
May 5 11:33:59 localhost kernel: usb 3-3: usb_autosuspend_device: cnt 3 -> 0
May 5 11:33:59 localhost kernel: usb 3-3: usb_autosuspend_device: cnt 2 -> 0
May 5 11:33:59 localhost kernel: drivers/usb/core/inode.c: creating file '002'
May 5 11:33:59 localhost kernel: hub 3-0:1.0: usb_autopm_put_interface: cnt 1 -> 0
May 5 11:33:59 localhost kernel: hub 1-0:1.0: state 7 ports 6 chg 0000 evt 0008
May 5 11:33:59 localhost kernel: hub 1-0:1.0: usb_autopm_get_interface: cnt 2 -> 1
May 5 11:33:59 localhost kernel: usb usb3: usb_autoresume_device: cnt 1 -> 1
May 5 11:33:59 localhost kernel: usb usb3: usb_autosuspend_device: cnt 0 -> -16
May 5 11:33:59 localhost kernel: usb usb3: usb_autoresume_device: cnt 1 -> 1
May 5 11:33:59 localhost kernel: usb usb3: usb_autosuspend_device: cnt 0 -> -16
May 5 11:33:59 localhost kernel: usb usb2: usb_autoresume_device: cnt 1 -> 1
May 5 11:33:59 localhost kernel: usb usb2: autosuspend_check do_remote_wakeup=1
May 5 11:33:59 localhost kernel: usb usb2: autosuspend_check time_before
May 5 11:33:59 localhost kernel: usb usb2: usb_autosuspend_device: cnt 0 -> 0
May 5 11:33:59 localhost kernel: usb usb2: usb_autoresume_device: cnt 1 -> 1
May 5 11:33:59 localhost kernel: usb usb2: autosuspend_check do_remote_wakeup=1
May 5 11:33:59 localhost kernel: usb usb2: autosuspend_check time_before
May 5 11:33:59 localhost kernel: usb usb2: usb_autosuspend_device: cnt 0 -> 0
May 5 11:33:59 localhost kernel: usb 1-6: usb_autoresume_device: cnt 2 -> 1
May 5 11:33:59 localhost kernel: usb 1-6: usb_autosuspend_device: cnt 1 -> 0
May 5 11:33:59 localhost kernel: hub 1-0:1.0: usb_autopm_put_interface: cnt 0 -> 0
May 5 11:34:00 localhost kernel: hub 3-0:1.0: state 7 ports 6 chg 0000 evt 0008
May 5 11:34:00 localhost kernel: hub 3-0:1.0: usb_autopm_get_interface: cnt 2 -> 1
May 5 11:34:00 localhost kernel: usb usb1: usb_autoresume_device: cnt 1 -> 1
May 5 11:34:00 localhost kernel: usb usb1: usb_autosuspend_device: cnt 0 -> -16
May 5 11:34:00 localhost kernel: usb 1-6: usb_autoresume_device: cnt 2 -> 1
May 5 11:34:00 localhost kernel: usb 1-6: usb_autosuspend_device: cnt 1 -> 0
May 5 11:34:00 localhost kernel: usb usb1: usb_autoresume_device: cnt 1 -> 1
May 5 11:34:00 localhost kernel: usb usb1: usb_autosuspend_device: cnt 0 -> -16
May 5 11:34:00 localhost kernel: hub 3-0:1.0: usb_autopm_put_interface: cnt 0 -> 0
May 5 11:34:00 localhost kernel: usb usb4: usb_autoresume_device: cnt 1 -> 1
May 5 11:34:00 localhost kernel: usb usb4: autosuspend_check do_remote_wakeup=1
May 5 11:34:00 localhost kernel: usb usb4: autosuspend_check time_before
May 5 11:34:00 localhost kernel: usb usb4: usb_autosuspend_device: cnt 0 -> 0
May 5 11:34:00 localhost kernel: usb usb4: usb_autoresume_device: cnt 1 -> 1
May 5 11:34:00 localhost kernel: usb usb4: autosuspend_check do_remote_wakeup=1
May 5 11:34:00 localhost kernel: usb usb4: autosuspend_check time_before
May 5 11:34:00 localhost kernel: usb usb4: usb_autosuspend_device: cnt 0 -> 0
May 5 11:34:00 localhost kernel: usb 3-3: usb_autoresume_device: cnt 1 -> 1
May 5 11:34:00 localhost kernel: usb 3-3: usb_autosuspend_device: cnt 0 -> -16
May 5 11:34:00 localhost kernel: usb usb3: usb_autoresume_device: cnt 1 -> 1
May 5 11:34:00 localhost kernel: usb usb3: usb_autosuspend_device: cnt 0 -> -16
May 5 11:34:00 localhost kernel: usb 3-3: usb_autoresume_device: cnt 1 -> 1
May 5 11:34:00 localhost kernel: usb 3-3: usb_autosuspend_device: cnt 0 -> -16
May 5 11:34:00 localhost kernel: usb usb3: usb_autoresume_device: cnt 1 -> 1
May 5 11:34:00 localhost kernel: usb usb3: usb_autosuspend_device: cnt 0 -> -16
May 5 11:34:00 localhost kernel: usb usb2: usb_autoresume_device: cnt 1 -> 1
May 5 11:34:00 localhost kernel: usb usb2: autosuspend_check do_remote_wakeup=1
May 5 11:34:00 localhost kernel: usb usb2: autosuspend_check time_before
May 5 11:34:00 localhost kernel: usb usb2: usb_autosuspend_device: cnt 0 -> 0
May 5 11:34:00 localhost kernel: usb usb2: usb_autoresume_device: cnt 1 -> 1
May 5 11:34:00 localhost kernel: usb usb2: autosuspend_check do_remote_wakeup=1
May 5 11:34:00 localhost kernel: usb usb2: autosuspend_check time_before
May 5 11:34:00 localhost kernel: usb usb2: usb_autosuspend_device: cnt 0 -> 0
May 5 11:34:00 localhost kernel: usb 1-6: usb_autoresume_device: cnt 2 -> 1
May 5 11:34:00 localhost kernel: usb 1-6: usb_autosuspend_device: cnt 1 -> 0
May 5 11:34:00 localhost kernel: usb usb1: usb_autoresume_device: cnt 1 -> 1
May 5 11:34:00 localhost kernel: usb usb1: usb_autosuspend_device: cnt 0 -> -16
May 5 11:34:00 localhost kernel: usb 1-6: usb_autoresume_device: cnt 2 -> 1
May 5 11:34:00 localhost kernel: usb 1-6: usb_autosuspend_device: cnt 1 -> 0
May 5 11:34:00 localhost kernel: usb usb1: usb_autoresume_device: cnt 1 -> 1
May 5 11:34:00 localhost kernel: usb usb1: usb_autosuspend_device: cnt 0 -> -16
May 5 11:34:01 localhost kernel: usb usb4: usb_autoresume_device: cnt 1 -> 1
May 5 11:34:01 localhost kernel: usb usb4: autosuspend_check do_remote_wakeup=1
May 5 11:34:01 localhost kernel: usb usb4: autosuspend_check time_before
May 5 11:34:01 localhost kernel: usb usb4: usb_autosuspend_device: cnt 0 -> 0
May 5 11:34:01 localhost kernel: usb usb4: usb_autoresume_device: cnt 1 -> 1
May 5 11:34:01 localhost kernel: usb usb4: autosuspend_check do_remote_wakeup=1
May 5 11:34:01 localhost kernel: usb usb4: autosuspend_check time_before
May 5 11:34:01 localhost kernel: usb usb4: usb_autosuspend_device: cnt 0 -> 0
May 5 11:34:01 localhost kernel: usb 3-3: usb_autoresume_device: cnt 1 -> 1
May 5 11:34:01 localhost kernel: usb 3-3: usb_autosuspend_device: cnt 0 -> -16
May 5 11:34:01 localhost kernel: usb usb3: usb_autoresume_device: cnt 1 -> 1
May 5 11:34:01 localhost kernel: usb usb3: usb_autosuspend_device: cnt 0 -> -16
May 5 11:34:01 localhost kernel: usb 3-3: usb_autoresume_device: cnt 1 -> 1
May 5 11:34:01 localhost kernel: usb 3-3: usb_autosuspend_device: cnt 0 -> -16
And so on.
Here is the usb-serial.c hack I mentioned above. It's in usb_serial_prove, right after the PL2303 hack.
#if defined(CONFIG_USB_SERIAL_EXAR) || defined(CONFIG_USB_SERIAL_EXAR_MODULE)
/* BEGIN HORRIBLE HACK FOR EXAR */
/* The descriptors aren't loony, but this is still a bit
* nasty, nonetheless. The device structures its endpoints
* the same was that CDC-ACM does, and uses an IAD to
* associate them. The first (management) interface in the
* association contains a single interrupt endpoint, and the
* second one (data) contains a bulk in and a bulk out.
*/
if (((le16_to_cpu(dev->descriptor.idVendor) == EXAR_VENDOR_ID) &&
(le16_to_cpu(dev->descriptor.idProduct) == EXAR_PRODUCT_ID_XRV1410))
|| ((le16_to_cpu(dev->descriptor.idVendor) == EXAR_VENDOR_ID) &&
(le16_to_cpu(dev->descriptor.idProduct) == EXAR_PRODUCT_ID_XRV1412))
|| ((le16_to_cpu(dev->descriptor.idVendor) == EXAR_VENDOR_ID) &&
(le16_to_cpu(dev->descriptor.idProduct) == EXAR_PRODUCT_ID_XRV1414))
|| ((le16_to_cpu(dev->descriptor.idVendor) == EXAR_VENDOR_ID) &&
(le16_to_cpu(dev->descriptor.idProduct) == EXAR_PRODUCT_ID_XRB1411))) {
struct usb_interface_assoc_descriptor *iad;
iad = interface->intf_assoc;
if (iad != NULL) {
if (interface->cur_altsetting->desc.bInterfaceNumber == iad->bFirstInterface) {
unlock_kernel();
dev_info(&interface->dev, "Skipping management interface\n");
kfree(serial);
return -ENODEV;
} else {
struct usb_interface *mgmt = usb_ifnum_to_if(dev, iad->bFirstInterface);
dev_info(&interface->dev, "Using management interface interrupt endpoints\n");
iface_desc = mgmt->cur_altsetting;
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
endpoint = &iface_desc->endpoint[i].desc;
if (usb_endpoint_is_int_in(endpoint)) {
dev_info(&interface->dev, "Taking interrupt endpoint from management interface\n");
interrupt_in_endpoint[num_interrupt_in] = endpoint;
++num_interrupt_in;
}
}
}
}
}
/* END HORRIBLE HACK FOR EXAR */
#endif
Rob.
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