src/patches/suse-2.6.27.39/patches.fixes/usb-hid-ncr-no-init-reports.patch

   1 From 5b915d9e6dc3d22fedde91dfef1cb1a8fa9a1870 Mon Sep 17 00:00:00 2001
   2 From: Jiri Kosina <jkosina@suse.cz>
   3 Date: Thu, 5 Nov 2009 14:08:03 +0100
   4 Subject: [PATCH] HID: fixup quirk for NCR devices
   5 Reference: bnc#548807
   6
   7 NCR devices are terminally broken by design -- they claim themselves to contain
   8 proper input applications in their HID report descriptor, but behave very badly
   9 if treated in standard way.
  10
  11 According to NCR developers, the devices get confused when queried for reports
  12 in a standard way, rendering them unusable.
  13
  14 NCR is shipping application called "RPSL" that can be used to drive these
  15 devices through hiddev, under the assumption that in-kernel driver doesn't
  16 perform initial report query.
  17 If it does, neither in-kernel nor hiddev-based driver can operate with these
  18 devices any more.
  19
  20 Introduce a quirk that skips the report query for all NCR devices. The previous
  21 NOGET quirk was wrong and had been introduced because I misunderstood the nature
  22 of brokenness of these devices.
  23
  24 Signed-off-by: Jiri Kosina <jkosina@suse.cz>
  25
  26 Index: linux-2.6.27/include/linux/hid.h
  27 ===================================================================
  28 --- linux-2.6.27.orig/include/linux/hid.h
  29 +++ linux-2.6.27/include/linux/hid.h
  30 @@ -284,6 +284,7 @@ struct hid_item {
  31  #define HID_QUIRK_MICROSOFT_KEYS               0x08000000
  32  #define HID_QUIRK_FULLSPEED_INTERVAL           0x10000000
  33  #define HID_QUIRK_APPLE_NUMLOCK_EMULATION      0x20000000
  34 +#define HID_QUIRK_NO_INIT_REPORTS              0x40000000
  35
  36  /*
  37   * Separate quirks for runtime report descriptor fixup
  38 Index: linux-2.6.27/drivers/hid/usbhid/hid-quirks.c
  39 ===================================================================
  40 --- linux-2.6.27.orig/drivers/hid/usbhid/hid-quirks.c
  41 +++ linux-2.6.27/drivers/hid/usbhid/hid-quirks.c
  42 @@ -993,7 +993,7 @@ u32 usbhid_lookup_quirk(const u16 idVend
  43         if (idVendor == USB_VENDOR_ID_NCR &&
  44                         idProduct >= USB_DEVICE_ID_NCR_FIRST &&
  45                         idProduct <= USB_DEVICE_ID_NCR_LAST)
  46 -                       return HID_QUIRK_NOGET;
  47 +                       return HID_QUIRK_NO_INIT_REPORTS;
  48
  49         down_read(&dquirks_rwsem);
  50         bl_entry = usbhid_exists_dquirk(idVendor, idProduct);
  51 Index: linux-2.6.27/drivers/hid/usbhid/hid-core.c
  52 ===================================================================
  53 --- linux-2.6.27.orig/drivers/hid/usbhid/hid-core.c
  54 +++ linux-2.6.27/drivers/hid/usbhid/hid-core.c
  55 @@ -980,7 +980,9 @@ static int hid_probe(struct usb_interfac
  56         if (!(hid = usb_hid_configure(intf)))
  57                 return -ENODEV;
  58
  59 -       usbhid_init_reports(hid);
  60 +       if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS))
  61 +               usbhid_init_reports(hid);
  62 +
  63         hid_dump_device(hid);
  64         if (hid->quirks & HID_QUIRK_RESET_LEDS)
  65                 usbhid_set_leds(hid);