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usb: hub: Support 'set hub depth' request for USB 3.0 hubs

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USB 3.0 hub uses a hub depth value multiplied by four as an offset
into the 'route string' to locate the bits it uses to determine the
downstream port number. We shall set the hub depth value of a USB
3.0 hub after it is configured.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng
2017-07-19 21:51:13 +08:00
committed by Marek Vasut
parent 74ffc7cbb1
commit bbc6f06c00
3 changed files with 56 additions and 0 deletions
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include/usb.h
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@@ -570,6 +570,7 @@ struct usb_hub_device {
ulong connect_timeout; /* Device connection timeout in ms */
ulong query_delay; /* Device query delay in ms */
int overcurrent_count[USB_MAXCHILDREN]; /* Over-current counter */
int hub_depth; /* USB 3.0 hub depth */
};
#ifdef CONFIG_DM_USB