diff options
| author | Vadim Mikhailov <mvp@users.noreply.github.com> | 2020-01-05 14:03:04 -0800 |
|---|---|---|
| committer | Vadim Mikhailov <mvp@users.noreply.github.com> | 2020-01-05 14:05:25 -0800 |
| commit | 6f84663c6a858e4f54860bd675557ba7f8c66fb8 (patch) | |
| tree | a269c35208d46ac96428bc7a07988095d8ebdee9 | |
| parent | 4aae44ced03980802c5fdadcea16d1bc2f8c0bdb (diff) | |
Clarify VBUS off requirements for Raspberry Pi 4
| -rw-r--r-- | README.md | 4 |
1 files changed, 2 insertions, 2 deletions
@@ -59,7 +59,7 @@ This is list of known compatible USB hubs: | Plugable | USB3-HUB7-81X | 7 | 3.0 |`2109:0813`| 2012 | | | Raspberry Pi | B+, 2B, 3B (port 2 only) | 4 | 2.0 | | 2011 | | | Raspberry Pi | 3B+ | 6 | 2.0 |`0424:2514`| 2018 | | -| Raspberry Pi | 4B (ganged, must use `-p all` to cut off VBUS) | 4 | 3.0 |`2109:3431`| 2019 | | +| Raspberry Pi | 4B (port 4 only) | 4 | 3.0 |`2109:3431`| 2019 | | | Renesas | uPD720202 PCIe USB 3.0 host controller | 2 | 3.0 | | 2013 | | | Rosewill | RHUB-210 | 4 | 2.0 |`0409:005A`| 2011 | 2014 | | Sanwa Supply | USB-HUB14GPH | 4 | 1.1 | | 2001 | 2003 | @@ -271,7 +271,7 @@ For reference, Raspberry Pi models have following internal USB topology: * 4B: Hardware only supports ganged power switching, firmware is reporting inconsistent USB descriptors. USB3 hub `2`, 4 ports, incorrectly reports per-port power switching. BOS `ContainerID` not reported (required for USB3). USB2 hub `1`, 1 port, no usable ports, connects hub `1-1` below. - USB2 hub `1-1`, 4 ports, dual to USB3 hub above. Hub descriptor reports ganged power switching. + USB2 hub `1-1`, 4 ports, dual to USB3 hub above. Hub descriptor reports ganged power switching. VBUS is controlled by port 4. USB2 hub `3`, 1 port, OTG controller, incorrectly reports ganged power switching. As a workaround, you can buy any external USB hub from supported list, |