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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2020-02-28 10:29:32 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2020-03-20 10:07:16 +0100 |
| commit | 891b0a02566c477e4b48cece3fbdae1fd3029a5c (patch) | |
| tree | 030e7dfd001ec160a9b1091b16e3e4b5dfac1446 /include/usb | |
| parent | 5b17d93e75795413bc66b0b20ee4f3960ddce316 (diff) | |
| download | barebox-891b0a02566c477e4b48cece3fbdae1fd3029a5c.tar.gz barebox-891b0a02566c477e4b48cece3fbdae1fd3029a5c.tar.xz | |
usb: hub: Parse and save TT details from device descriptor
Adoption of U-Boot commit 5624dfd5aa91c244519ec60b40b4a42b4d9a43ca:
| commit 5624dfd5aa91c244519ec60b40b4a42b4d9a43ca
| Author: Bin Meng <bmeng.cn@gmail.com>
| Date: Wed Jul 19 21:51:16 2017 +0800
|
| usb: hub: Parse and save TT details from device descriptor
|
| A high speed hub has a special responsibility to handle full speed/
| low speed devices connected on downstream ports. In this case, the
| hub must isolate the high speed signaling environment from the full
| speed/low speed signaling environment with the help of Transaction
| Translator (TT). TT details are provided by hub descriptors and we
| parse and save it to hub uclass_priv for later use.
|
| Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
| Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'include/usb')
| -rw-r--r-- | include/usb/usb.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/usb/usb.h b/include/usb/usb.h index a9c34cdde4..94506fa525 100644 --- a/include/usb/usb.h +++ b/include/usb/usb.h @@ -306,6 +306,16 @@ void usb_rescan(void); #define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL) #define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK) +/* + * As of USB 2.0, full/low speed devices are segregated into trees. + * One type grows from USB 1.1 host controllers (OHCI, UHCI etc). + * The other type grows from high speed hubs when they connect to + * full/low speed devices using "Transaction Translators" (TTs). + */ +struct usb_tt { + bool multi; /* true means one TT per port */ + unsigned think_time; /* think time in ns */ +}; /************************************************************************* * Hub Stuff @@ -316,6 +326,7 @@ struct usb_hub_device { uint64_t connect_timeout; /* Device connection timeout in ns */ uint64_t query_delay; /* Device query delay in ns */ int overcurrent_count[USB_MAXCHILDREN]; /* Over-current counter */ + struct usb_tt tt; /* Transaction Translator */ }; /** |