linux-kernel - [PATCH v4 0/2] ARM: sun8i-r40: Enable usb otg support

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Message-Id: <20220518101706.26869-1-qianfanguijin@163.com>
Date:   Wed, 18 May 2022 18:17:04 +0800
From:   qianfanguijin@....com
To:     linux-sunxi@...ts.linux.dev
Cc:     Andre Przywara <andre.przywara@....com>,
        Evgeny Boger <boger@...enboard.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, qianfan Zhao <qianfanguijin@....com>
Subject: [PATCH v4 0/2] ARM: sun8i-r40: Enable usb otg support

From: qianfan Zhao <qianfanguijin@....com>

History:
=======

v4(2022-05-18):
- Enable both musb and OHCI/EHCI support

Tests:
======

All test cases were tested on bananapi-m2-ultra.

1. USB DEVICE(ping test)

Enable usb gadget rndis network, ping m2u on ubuntu host:

➜  ~ ping 192.168.200.2
PING 192.168.200.2 (192.168.200.2) 56(84) bytes of data.
64 bytes from 192.168.200.2: icmp_seq=1 ttl=64 time=0.544 ms
64 bytes from 192.168.200.2: icmp_seq=2 ttl=64 time=0.269 ms
64 bytes from 192.168.200.2: icmp_seq=3 ttl=64 time=0.300 ms
64 bytes from 192.168.200.2: icmp_seq=4 ttl=64 time=0.295 ms
64 bytes from 192.168.200.2: icmp_seq=5 ttl=64 time=0.283 ms
64 bytes from 192.168.200.2: icmp_seq=6 ttl=64 time=0.226 ms
64 bytes from 192.168.200.2: icmp_seq=7 ttl=64 time=0.246 ms
64 bytes from 192.168.200.2: icmp_seq=8 ttl=64 time=0.204 ms
64 bytes from 192.168.200.2: icmp_seq=9 ttl=64 time=0.302 ms
64 bytes from 192.168.200.2: icmp_seq=10 ttl=64 time=0.249 ms
64 bytes from 192.168.200.2: icmp_seq=11 ttl=64 time=0.459 ms
64 bytes from 192.168.200.2: icmp_seq=12 ttl=64 time=0.232 ms
64 bytes from 192.168.200.2: icmp_seq=13 ttl=64 time=0.275 ms
64 bytes from 192.168.200.2: icmp_seq=14 ttl=64 time=0.243 ms

2. USB HOST(OHCI)

Connect an usb serial port on OTG port, nex t is the kernel log:

[   27.824137] usb 2-1: new full-speed USB device number 2 using ohci-platform
[   28.865504] cdc_acm 2-1:1.0: ttyACM0: USB ACM device
[   29.565509] cdc_acm 2-1:1.2: ttyACM1: USB ACM device

3. USB HOST(EHCI)

Connect an usb storage on OTG port, next is the kernel log:

[   17.754147] usb 1-1: new high-speed USB device number 2 using ehci-platform
[   17.955995] usb-storage 1-1:1.0: USB Mass Storage device detected
[   18.024497] scsi host1: usb-storage 1-1:1.0
[   19.035091] scsi 1:0:0:0: Direct-Access     General  USB Flash Disk   1.0  PQ: 0 ANSI: 2
[   19.049717] sd 1:0:0:0: [sda] 7831552 512-byte logical blocks: (4.01 GB/3.73 GiB)
[   19.060873] sd 1:0:0:0: [sda] Write Protect is off
[   19.071018] sd 1:0:0:0: [sda] No Caching mode page found
[   19.076437] sd 1:0:0:0: [sda] Assuming drive cache: write through
[   19.093566]  sda: sda1
[   19.103492] sd 1:0:0:0: [sda] Attached SCSI removable disk

issues:
=======

The system power often turned off when I plugged an usb device into the OTG port.
It's not clear why.

qianfan Zhao (2):
  ARM: dts: sun8i-r40: Add USB0_OTG/HOST support
  ARM: dts: bananapi-m2-ultra: Enable USB0_OTG and HOST support

 .../boot/dts/sun8i-r40-bananapi-m2-ultra.dts  | 39 +++++++++++++++++++
 arch/arm/boot/dts/sun8i-r40.dtsi              | 34 ++++++++++++++++
 2 files changed, 73 insertions(+)

-- 
2.25.1