usb: hcd.h: construct hub class request constants from simpler constants
Currently, each hub class request constant is defined by a line like: #define ClearHubFeature (0x2000 | USB_REQ_CLEAR_FEATURE) The "magic" number for the high byte is one of 0x20, 0xa0, 0x23, 0xa3. The 0x80 bit that changes inditace USB_DIR_IN, and the 0x03 that pops up is the difference between USB_RECIP_DEVICE (0x00) and USB_RECIP_OTHER (0x03). The constant 0x20 bit is USB_TYPE_CLASS. This patch eliminates those magic numbers by defining a macro to help construct these hub class request from simpler constants. Note that USB_RT_HUB is defined as (USB_TYPE_CLASS | USB_RECIP_DEVICE) and that USB_RT_PORT is defined as (USB_TYPE_CLASS | USB_RECIP_OTHER). Signed-off-by: Tal Shorer <tal.shorer@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -566,21 +566,22 @@ extern void usb_ep0_reinit(struct usb_device *);
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((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
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/* class requests from the USB 2.0 hub spec, table 11-15 */
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#define HUB_CLASS_REQ(dir, type, request) ((((dir) | (type)) << 8) | (request))
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/* GetBusState and SetHubDescriptor are optional, omitted */
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#define ClearHubFeature (0x2000 | USB_REQ_CLEAR_FEATURE)
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#define ClearPortFeature (0x2300 | USB_REQ_CLEAR_FEATURE)
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#define GetHubDescriptor (0xa000 | USB_REQ_GET_DESCRIPTOR)
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#define GetHubStatus (0xa000 | USB_REQ_GET_STATUS)
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#define GetPortStatus (0xa300 | USB_REQ_GET_STATUS)
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#define SetHubFeature (0x2000 | USB_REQ_SET_FEATURE)
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#define SetPortFeature (0x2300 | USB_REQ_SET_FEATURE)
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#define ClearHubFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_HUB, USB_REQ_CLEAR_FEATURE)
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#define ClearPortFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_PORT, USB_REQ_CLEAR_FEATURE)
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#define GetHubDescriptor HUB_CLASS_REQ(USB_DIR_IN, USB_RT_HUB, USB_REQ_GET_DESCRIPTOR)
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#define GetHubStatus HUB_CLASS_REQ(USB_DIR_IN, USB_RT_HUB, USB_REQ_GET_STATUS)
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#define GetPortStatus HUB_CLASS_REQ(USB_DIR_IN, USB_RT_PORT, USB_REQ_GET_STATUS)
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#define SetHubFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_HUB, USB_REQ_SET_FEATURE)
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#define SetPortFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_PORT, USB_REQ_SET_FEATURE)
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/*-------------------------------------------------------------------------*/
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/* class requests from USB 3.1 hub spec, table 10-7 */
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#define SetHubDepth (0x2000 | HUB_SET_DEPTH)
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#define GetPortErrorCount (0xa300 | HUB_GET_PORT_ERR_COUNT)
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#define SetHubDepth HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_HUB, HUB_SET_DEPTH)
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#define GetPortErrorCount HUB_CLASS_REQ(USB_DIR_IN, USB_RT_PORT, HUB_GET_PORT_ERR_COUNT)
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/*
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* Generic bandwidth allocation constants/support
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