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Merge remote-tracking branch 'kraxel/tags/pull-usb-2' into staging
usb core+hid: add support for microsoft os descriptors # gpg: Signature made Tue 21 Jan 2014 02:21:29 AM PST using RSA key ID D3E87138 # gpg: Can't check signature: public key not found * kraxel/tags/pull-usb-2: usb-hid: add microsoft os descriptor support usb: add support for microsoft os descriptors Message-id: 1390299772-5368-1-git-send-email-kraxel@redhat.com Signed-off-by: Anthony Liguori <aliguori@amazon.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,234 @@ | ||
| #include "hw/usb.h" | ||
| #include "hw/usb/desc.h" | ||
|
|
||
| /* | ||
| * Microsoft OS Descriptors | ||
| * | ||
| * Windows tries to fetch some special descriptors with informations | ||
| * specifically for windows. Presence is indicated using a special | ||
| * string @ index 0xee. There are two kinds of descriptors: | ||
| * | ||
| * compatid descriptor | ||
| * Used to bind drivers, if usb class isn't specific enougth. | ||
| * Used for PTP/MTP for example (both share the same usb class). | ||
| * | ||
| * properties descriptor | ||
| * Does carry registry entries. They show up in | ||
| * HLM\SYSTEM\CurrentControlSet\Enum\USB\<devid>\<serial>\Device Parameters | ||
| * | ||
| * Note that Windows caches the stuff it got in the registry, so when | ||
| * playing with this you have to delete registry subtrees to make | ||
| * windows query the device again: | ||
| * HLM\SYSTEM\CurrentControlSet\Control\usbflags | ||
| * HLM\SYSTEM\CurrentControlSet\Enum\USB | ||
| * Windows will complain it can't delete entries on the second one. | ||
| * It has deleted everything it had permissions too, which is enouth | ||
| * as this includes "Device Parameters". | ||
| * | ||
| * http://msdn.microsoft.com/en-us/library/windows/hardware/ff537430.aspx | ||
| * | ||
| */ | ||
|
|
||
| /* ------------------------------------------------------------------ */ | ||
|
|
||
| typedef struct msos_compat_hdr { | ||
| uint32_t dwLength; | ||
| uint8_t bcdVersion_lo; | ||
| uint8_t bcdVersion_hi; | ||
| uint8_t wIndex_lo; | ||
| uint8_t wIndex_hi; | ||
| uint8_t bCount; | ||
| uint8_t reserved[7]; | ||
| } QEMU_PACKED msos_compat_hdr; | ||
|
|
||
| typedef struct msos_compat_func { | ||
| uint8_t bFirstInterfaceNumber; | ||
| uint8_t reserved_1; | ||
| uint8_t compatibleId[8]; | ||
| uint8_t subCompatibleId[8]; | ||
| uint8_t reserved_2[6]; | ||
| } QEMU_PACKED msos_compat_func; | ||
|
|
||
| static int usb_desc_msos_compat(const USBDesc *desc, uint8_t *dest) | ||
| { | ||
| msos_compat_hdr *hdr = (void *)dest; | ||
| msos_compat_func *func; | ||
| int length = sizeof(*hdr); | ||
| int count = 0; | ||
|
|
||
| func = (void *)(dest + length); | ||
| func->bFirstInterfaceNumber = 0; | ||
| func->reserved_1 = 0x01; | ||
| length += sizeof(*func); | ||
| count++; | ||
|
|
||
| hdr->dwLength = cpu_to_le32(length); | ||
| hdr->bcdVersion_lo = 0x00; | ||
| hdr->bcdVersion_hi = 0x01; | ||
| hdr->wIndex_lo = 0x04; | ||
| hdr->wIndex_hi = 0x00; | ||
| hdr->bCount = count; | ||
| return length; | ||
| } | ||
|
|
||
| /* ------------------------------------------------------------------ */ | ||
|
|
||
| typedef struct msos_prop_hdr { | ||
| uint32_t dwLength; | ||
| uint8_t bcdVersion_lo; | ||
| uint8_t bcdVersion_hi; | ||
| uint8_t wIndex_lo; | ||
| uint8_t wIndex_hi; | ||
| uint8_t wCount_lo; | ||
| uint8_t wCount_hi; | ||
| } QEMU_PACKED msos_prop_hdr; | ||
|
|
||
| typedef struct msos_prop { | ||
| uint32_t dwLength; | ||
| uint32_t dwPropertyDataType; | ||
| uint8_t dwPropertyNameLength_lo; | ||
| uint8_t dwPropertyNameLength_hi; | ||
| uint8_t bPropertyName[]; | ||
| } QEMU_PACKED msos_prop; | ||
|
|
||
| typedef struct msos_prop_data { | ||
| uint32_t dwPropertyDataLength; | ||
| uint8_t bPropertyData[]; | ||
| } QEMU_PACKED msos_prop_data; | ||
|
|
||
| typedef enum msos_prop_type { | ||
| MSOS_REG_SZ = 1, | ||
| MSOS_REG_EXPAND_SZ = 2, | ||
| MSOS_REG_BINARY = 3, | ||
| MSOS_REG_DWORD_LE = 4, | ||
| MSOS_REG_DWORD_BE = 5, | ||
| MSOS_REG_LINK = 6, | ||
| MSOS_REG_MULTI_SZ = 7, | ||
| } msos_prop_type; | ||
|
|
||
| static int usb_desc_msos_prop_name(struct msos_prop *prop, | ||
| const wchar_t *name) | ||
| { | ||
| int length = wcslen(name) + 1; | ||
| int i; | ||
|
|
||
| prop->dwPropertyNameLength_lo = usb_lo(length*2); | ||
| prop->dwPropertyNameLength_hi = usb_hi(length*2); | ||
| for (i = 0; i < length; i++) { | ||
| prop->bPropertyName[i*2] = usb_lo(name[i]); | ||
| prop->bPropertyName[i*2+1] = usb_hi(name[i]); | ||
| } | ||
| return length*2; | ||
| } | ||
|
|
||
| static int usb_desc_msos_prop_str(uint8_t *dest, msos_prop_type type, | ||
| const wchar_t *name, const wchar_t *value) | ||
| { | ||
| struct msos_prop *prop = (void *)dest; | ||
| struct msos_prop_data *data; | ||
| int length = sizeof(*prop); | ||
| int i, vlen = wcslen(value) + 1; | ||
|
|
||
| prop->dwPropertyDataType = cpu_to_le32(type); | ||
| length += usb_desc_msos_prop_name(prop, name); | ||
| data = (void *)(dest + length); | ||
|
|
||
| data->dwPropertyDataLength = cpu_to_le32(vlen*2); | ||
| length += sizeof(*prop); | ||
|
|
||
| for (i = 0; i < vlen; i++) { | ||
| data->bPropertyData[i*2] = usb_lo(value[i]); | ||
| data->bPropertyData[i*2+1] = usb_hi(value[i]); | ||
| } | ||
| length += vlen*2; | ||
|
|
||
| prop->dwLength = cpu_to_le32(length); | ||
| return length; | ||
| } | ||
|
|
||
| static int usb_desc_msos_prop_dword(uint8_t *dest, const wchar_t *name, | ||
| uint32_t value) | ||
| { | ||
| struct msos_prop *prop = (void *)dest; | ||
| struct msos_prop_data *data; | ||
| int length = sizeof(*prop); | ||
|
|
||
| prop->dwPropertyDataType = cpu_to_le32(MSOS_REG_DWORD_LE); | ||
| length += usb_desc_msos_prop_name(prop, name); | ||
| data = (void *)(dest + length); | ||
|
|
||
| data->dwPropertyDataLength = cpu_to_le32(4); | ||
| data->bPropertyData[0] = (value) & 0xff; | ||
| data->bPropertyData[1] = (value >> 8) & 0xff; | ||
| data->bPropertyData[2] = (value >> 16) & 0xff; | ||
| data->bPropertyData[3] = (value >> 24) & 0xff; | ||
| length += sizeof(*prop) + 4; | ||
|
|
||
| prop->dwLength = cpu_to_le32(length); | ||
| return length; | ||
| } | ||
|
|
||
| static int usb_desc_msos_prop(const USBDesc *desc, uint8_t *dest) | ||
| { | ||
| msos_prop_hdr *hdr = (void *)dest; | ||
| int length = sizeof(*hdr); | ||
| int count = 0; | ||
|
|
||
| if (desc->msos->Label) { | ||
| /* | ||
| * Given as example in the specs. Havn't figured yet where | ||
| * this label shows up in the windows gui. | ||
| */ | ||
| length += usb_desc_msos_prop_str(dest+length, MSOS_REG_SZ, | ||
| L"Label", desc->msos->Label); | ||
| count++; | ||
| } | ||
|
|
||
| if (desc->msos->SelectiveSuspendEnabled) { | ||
| /* | ||
| * Signaling remote wakeup capability in the standard usb | ||
| * descriptors isn't enouth to make windows actually use it. | ||
| * This is the "Yes, we really mean it" registy entry to flip | ||
| * the switch in the windows drivers. | ||
| */ | ||
| length += usb_desc_msos_prop_dword(dest+length, | ||
| L"SelectiveSuspendEnabled", 1); | ||
| count++; | ||
| } | ||
|
|
||
| hdr->dwLength = cpu_to_le32(length); | ||
| hdr->bcdVersion_lo = 0x00; | ||
| hdr->bcdVersion_hi = 0x01; | ||
| hdr->wIndex_lo = 0x05; | ||
| hdr->wIndex_hi = 0x00; | ||
| hdr->wCount_lo = usb_lo(count); | ||
| hdr->wCount_hi = usb_hi(count); | ||
| return length; | ||
| } | ||
|
|
||
| /* ------------------------------------------------------------------ */ | ||
|
|
||
| int usb_desc_msos(const USBDesc *desc, USBPacket *p, | ||
| int index, uint8_t *dest, size_t len) | ||
| { | ||
| void *buf = g_malloc0(4096); | ||
| int length = 0; | ||
|
|
||
| switch (index) { | ||
| case 0x0004: | ||
| length = usb_desc_msos_compat(desc, buf); | ||
| break; | ||
| case 0x0005: | ||
| length = usb_desc_msos_prop(desc, buf); | ||
| break; | ||
| } | ||
|
|
||
| if (length > len) { | ||
| length = len; | ||
| } | ||
| memcpy(dest, buf, length); | ||
| free(buf); | ||
|
|
||
| p->actual_length = length; | ||
| return 0; | ||
| } |
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