Date: Fri, 14 Jun 2024 17:40:39 +0200 From: JMT Sihvola <jsihv@gmx.com> To: freebsd-riscv@freebsd.org Subject: Re: JH7110 dwc MAC support Message-ID: <trinity-e7a78d45-28c3-4905-9504-37475fb12770-1718379639909@3c-app-mailcom-bs01> In-Reply-To: <7E28ED97-DD4B-40AA-91FB-DB3982042265@mit.edu> References: <7E28ED97-DD4B-40AA-91FB-DB3982042265@mit.edu>
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> Sent: Friday, June 14, 2024 at 6:06 PM > From: "John F Carr" <jfc@mit.edu> > To: "freebsd-riscv@freebsd.org" <freebsd-riscv@FreeBSD.org> > Subject: JH7110 dwc MAC support > > Has anybody gotten the ethernet driver working on this chip? > It's a DesignWare MAC according to the device tree so if_dwc.c > should be the starting point. The driver does not work > simply by changing the "compatible" string. It can't find > the PHY because all the register reads come back 0. The > only documentation I can find is the Linux driver source code. > I can try updating register offsets and command bit patterns > to match what the Linux driver does with "snps,dwmac-5.20". JH7110 uses dwmac version 5.2. FreeBSD has codes for 4.x (which is almost similar) in sys/dev/eqos. JH7110 also uses Motorcomm's Ethernet-phy version 8531 which currently isn't supported. I have updated those codes to get network working on JH7110 but I have not yet submitted them because there is a problem which prevents changing the Ethernet port on fly. It's possible that this problem is caused by a bug outside of these drivers. It has been difficult to track it down but I keep working on with the issue. I have those updated driver codes in my personal github: https://github.com/jsihvola/freebsd-src/ See the last commit (otherwise this repository is not up-to-date). So if you can live with the port switching issue, those codes should make it possible to get JH7110 online. Also, eqos driver has some shortcomings, making network speed slower than what it could be. JH7110 clocks required by Ethernet are available in FreeBSD repository. GPIO & MMC have been submitted. USB & pinctrl are being worked on. -jari sihvola
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