include/linux/usb/audio.h: add __attribute__((packed))

[safe/jmp/linux-2.6] / include / linux / usb / audio.h

diff --git a/include/linux/usb/audio.h b/include/linux/usb/audio.h
index cdad728..9fae6bd 100644 (file)
--- a/include/linux/usb/audio.h
+++ b/include/linux/usb/audio.h
@@ -181,6 +181,156 @@ struct uac_feature_unit_descriptor_##ch {                 \
        __u8  iFeature;                                         \
 } __attribute__ ((packed))
 
+/* 4.3.2.3 Mixer Unit Descriptor */
+struct uac_mixer_unit_descriptor {
+       __u8 bLength;
+       __u8 bDescriptorType;
+       __u8 bDescriptorSubtype;
+       __u8 bUnitID;
+       __u8 bNrInPins;
+       __u8 baSourceID[];
+} __attribute__ ((packed));
+
+static inline __u8 uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor *desc)
+{
+       return desc->baSourceID[desc->bNrInPins];
+}
+
+static inline __u32 uac_mixer_unit_wChannelConfig(struct uac_mixer_unit_descriptor *desc,
+                                                 int protocol)
+{
+       if (protocol == UAC_VERSION_1)
+               return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
+                       desc->baSourceID[desc->bNrInPins + 1];
+       else
+               return  (desc->baSourceID[desc->bNrInPins + 4] << 24) |
+                       (desc->baSourceID[desc->bNrInPins + 3] << 16) |
+                       (desc->baSourceID[desc->bNrInPins + 2] << 8)  |
+                       (desc->baSourceID[desc->bNrInPins + 1]);
+}
+
+static inline __u8 uac_mixer_unit_iChannelNames(struct uac_mixer_unit_descriptor *desc,
+                                               int protocol)
+{
+       return (protocol == UAC_VERSION_1) ?
+               desc->baSourceID[desc->bNrInPins + 3] :
+               desc->baSourceID[desc->bNrInPins + 5];
+}
+
+static inline __u8 *uac_mixer_unit_bmControls(struct uac_mixer_unit_descriptor *desc,
+                                             int protocol)
+{
+       return (protocol == UAC_VERSION_1) ?
+               &desc->baSourceID[desc->bNrInPins + 4] :
+               &desc->baSourceID[desc->bNrInPins + 6];
+}
+
+static inline __u8 uac_mixer_unit_iMixer(struct uac_mixer_unit_descriptor *desc)
+{
+       __u8 *raw = (__u8 *) desc;
+       return raw[desc->bLength - 1];
+}
+
+/* 4.3.2.4 Selector Unit Descriptor */
+struct uac_selector_unit_descriptor {
+       __u8 bLength;
+       __u8 bDescriptorType;
+       __u8 bDescriptorSubtype;
+       __u8 bUintID;
+       __u8 bNrInPins;
+       __u8 baSourceID[];
+} __attribute__ ((packed));
+
+static inline __u8 uac_selector_unit_iSelector(struct uac_selector_unit_descriptor *desc)
+{
+       __u8 *raw = (__u8 *) desc;
+       return raw[9 + desc->bLength - 1];
+}
+
+/* 4.3.2.5 Feature Unit Descriptor */
+struct uac_feature_unit_descriptor {
+       __u8 bLength;
+       __u8 bDescriptorType;
+       __u8 bDescriptorSubtype;
+       __u8 bUnitID;
+       __u8 bSourceID;
+       __u8 bControlSize;
+       __u8 bmaControls[0]; /* variable length */
+} __attribute__((packed));
+
+static inline __u8 uac_feature_unit_iFeature(struct uac_feature_unit_descriptor *desc)
+{
+       __u8 *raw = (__u8 *) desc;
+       return raw[desc->bLength - 1];
+}
+
+/* 4.3.2.6 Processing Unit Descriptors */
+struct uac_processing_unit_descriptor {
+       __u8 bLength;
+       __u8 bDescriptorType;
+       __u8 bDescriptorSubtype;
+       __u8 bUnitID;
+       __u16 wProcessType;
+       __u8 bNrInPins;
+       __u8 baSourceID[];
+} __attribute__ ((packed));
+
+static inline __u8 uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor *desc)
+{
+       return desc->baSourceID[desc->bNrInPins];
+}
+
+static inline __u32 uac_processing_unit_wChannelConfig(struct uac_processing_unit_descriptor *desc,
+                                                      int protocol)
+{
+       if (protocol == UAC_VERSION_1)
+               return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
+                       desc->baSourceID[desc->bNrInPins + 1];
+       else
+               return  (desc->baSourceID[desc->bNrInPins + 4] << 24) |
+                       (desc->baSourceID[desc->bNrInPins + 3] << 16) |
+                       (desc->baSourceID[desc->bNrInPins + 2] << 8)  |
+                       (desc->baSourceID[desc->bNrInPins + 1]);
+}
+
+static inline __u8 uac_processing_unit_iChannelNames(struct uac_processing_unit_descriptor *desc,
+                                                    int protocol)
+{
+       return (protocol == UAC_VERSION_1) ?
+               desc->baSourceID[desc->bNrInPins + 3] :
+               desc->baSourceID[desc->bNrInPins + 5];
+}
+
+static inline __u8 uac_processing_unit_bControlSize(struct uac_processing_unit_descriptor *desc,
+                                                   int protocol)
+{
+       return (protocol == UAC_VERSION_1) ?
+               desc->baSourceID[desc->bNrInPins + 4] :
+               desc->baSourceID[desc->bNrInPins + 6];
+}
+
+static inline __u8 *uac_processing_unit_bmControls(struct uac_processing_unit_descriptor *desc,
+                                                  int protocol)
+{
+       return (protocol == UAC_VERSION_1) ?
+               &desc->baSourceID[desc->bNrInPins + 5] :
+               &desc->baSourceID[desc->bNrInPins + 7];
+}
+
+static inline __u8 uac_processing_unit_iProcessing(struct uac_processing_unit_descriptor *desc,
+                                                  int protocol)
+{
+       __u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
+       return desc->baSourceID[desc->bNrInPins + control_size];
+}
+
+static inline __u8 *uac_processing_unit_specific(struct uac_processing_unit_descriptor *desc,
+                                                int protocol)
+{
+       __u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
+       return &desc->baSourceID[desc->bNrInPins + control_size + 1];
+}
+
 /* 4.5.2 Class-Specific AS Interface Descriptor */
 struct uac_as_header_descriptor_v1 {
        __u8  bLength;                  /* in bytes: 7 */
@@ -306,7 +456,7 @@ struct uac_iso_endpoint_descriptor {
        __u8  bmAttributes;
        __u8  bLockDelayUnits;
        __le16 wLockDelay;
-};
+} __attribute__((packed));
 #define UAC_ISO_ENDPOINT_DESC_SIZE     7
 
 #define UAC_EP_CS_ATTR_SAMPLE_RATE     0x01
@@ -315,16 +465,6 @@ struct uac_iso_endpoint_descriptor {
 
 /* A.10.2 Feature Unit Control Selectors */
 
-struct uac_feature_unit_descriptor {
-       __u8 bLength;
-       __u8 bDescriptorType;
-       __u8 bDescriptorSubtype;
-       __u8 bUnitID;
-       __u8 bSourceID;
-       __u8 bControlSize;
-       __u8 controls[0]; /* variable length */
-} __attribute__((packed));
-
 #define UAC_FU_CONTROL_UNDEFINED       0x00
 #define UAC_MUTE_CONTROL               0x01
 #define UAC_VOLUME_CONTROL             0x02