Merge tag 'firewire-updates-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394

Pull firewire updates from Takashi Sakamoto:
 "This includes two changes for core functions, which affects all use
  cases of this subsystem:

   - Handle per-device interoperability quirks

     Some devices have quirks affecting interoperability. To identify
     such quirks at an early stages of device detection, the step for
     reading the configuration ROM contents has been changed. As a side
     effect, the entire detection process is now performed at the basic
     transaction speed (S100), without a trial to probe higher
     supported speeds.

     With this change, the following devices should now work with fewer
     issues:
      - TASCAM FW-1884, FW-1804, and FW-1082
      - MOTU Audio Express

   - Safer removals of host card

     There was a race condition between host card removal and handling
     of bus reset events in the workqueue. This appears to be a long
     standing issue, and recent changes to use more workqueues escalate
     it.

     To solve it, a new callback has been added to the 1394 OHCI PCI
     driver to unregister the interrupt sources and wait for workqueue
     completions when removing a card instance"

* tag 'firewire-updates-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
  firewire: core: abort pending transactions at card removal
  firewire: core: add WQ_UNBOUND to alloc_workqueue users
  firewire: core: clear sources of hardware interrupt at card removal
  firewire: core: code refactoring to find and pop transaction entry
  firewire: core: code refactoring to remove transaction entry
  firewire: core: use cleanup function to release cached configuration ROM
  ALSA: firewire-tascam: reserve resources for transferred isochronous packets at S400
  firewire: core: handle device quirk of TASCAM FW-1884/FW-1804/FW-1082
  firewire: core: determine transaction speed after detecting quirks
  firewire: core: code refactoring to compute transaction speed
  firewire: core: handle device quirk of MOTU Audio Express
  firewire: core: detect device quirk when reading configuration ROM

1 files changed, 17 insertions, 0 deletions

diff --git a/include/linux/firewire.h b/include/linux/firewire.h
index 6d208769d456..6143b7d28eac 100644
--- a/include/linux/firewire.h
+++ b/include/linux/firewire.h
@@ -170,6 +170,20 @@ struct fw_attribute_group {
 	struct attribute *attrs[13];
 };
 
+enum fw_device_quirk {
+	// See afa1282a35d3 ("firewire: core: check for 1394a compliant IRM, fix inaccessibility of Sony camcorder").
+	FW_DEVICE_QUIRK_IRM_IS_1394_1995_ONLY = BIT(0),
+
+	// See a509e43ff338 ("firewire: core: fix unstable I/O with Canon camcorder").
+	FW_DEVICE_QUIRK_IRM_IGNORES_BUS_MANAGER = BIT(1),
+
+	// MOTU Audio Express transfers acknowledge packet with 0x10 for pending state.
+	FW_DEVICE_QUIRK_ACK_PACKET_WITH_INVALID_PENDING_CODE = BIT(2),
+
+	// TASCAM FW-1082/FW-1804/FW-1884 often freezes when receiving S400 packets.
+	FW_DEVICE_QUIRK_UNSTABLE_AT_S400 = BIT(3),
+};
+
 enum fw_device_state {
 	FW_DEVICE_INITIALIZING,
 	FW_DEVICE_RUNNING,
@@ -203,6 +217,9 @@ struct fw_device {
 	struct fw_card *card;
 	struct device device;
 
+	// A set of enum fw_device_quirk.
+	int quirks;
+
 	struct mutex client_list_mutex;
 	struct list_head client_list;