#Broadcom bcm43xx wireless network adapter drivers for mac driversThe host is generally expected to provide drivers for the IP cores found on the SoC backplane since these cores are found in both BHND SoCs and BHND Wi-Fi devices, it is advantageous to share driver and platform code between the two targets. Any backplane interrupt vectors routed to the bridge core may be mapped by the bridge to host interrupts (e.g., PCI INTx/MSI/MSI-X).These address regions may be used as a target for the on-chip DMA engines. DMA is supported by the bridge core’s sparse mapping of host address space into the backplane address space. #Broadcom bcm43xx wireless network adapter drivers for mac windowsHost access to SoC address space is provided via a set of register windows (e.g., a set of configurable windows into SoC address space mapped via PCI BARs).When BHND hardware is used in a PCI Wi-Fi card, or a SDIO Wi-Fi module, the device's dual-mode peripheral controller is configured to operate as an endpoint device on the host's peripheral bus, bridging access to the SoC hardware: The IP cores used in earlier SSB-based devices were adapted for compatibility with the new backplane. Subsequent hardware adopted Broadcom’s “BCMA” backplane, based on ARM’s AMBA IP.Hardware designed prior to 2009 used Broadcom’s “SSB” backplane architecture, based on Sonics Silicon’s interconnect IP.A Brief Background on Broadcom Wi-Fi Hardwareīroadcom's Wi-Fi devices are members of the Broadcom Home Networking Division (BHND) device family other BHND devices include MIPS/ARM SoCs (including Wi-Fi SoCs commonly found in consumer access points), as well as a large variety of related networking hardware.īHND devices utilize a common set of Broadcom IP cores (or "functional blocks") connected via one of two on-chip bus architectures: Now that my efforts on FreeBSD/Broadcom Wi-Fi support have progressed far enough to be generally useful, I wanted to take some time to provide a brief overview of Broadcom's Wi-Fi hardware, and explain how my work provides a foundation for further FreeBSD Broadcom Wi-Fi/SoC improvements. With these changes in place, I was finally able to port the existing bwn(4) Broadcom SoftMAC Wi-Fi driver to the bhnd(4) bus, and implement initial support for the BCM43224 and BCM43225 chipsets, with additional hardware support to be forthcoming. Thanks to the generosity of the FreeBSD Foundation, I've recently finished implementing the necessary improvements to the bhnd(4) driver family. #Broadcom bcm43xx wireless network adapter drivers for mac fullSince 2015, I've been working on improving FreeBSD support for Broadcom Wi-Fi devices and SoCs, including authoring the bhnd(4) driver family, which provides a unified bus and driver programming interface for these devices.įirst committed in early 2016, bhnd(4) allowed us to quickly bring up FreeBSD/MIPS on Broadcom SoCs, but it has taken much longer to implement the full set of features required to support modern Broadcom SoftMAC Wi-Fi hardware. FreeBSD Broadcom Wi-Fi Improvements, 17:13 PST Introduction
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