EP(4) | Kernel Interfaces Manual | EP(4) |
The 3c515 is an ISA 10/100 card with DMA capability. The chipset is similar to that of the 3c905, with some changes to make it work with the more limited ISA bus address space. This card is supported, although DMA is not used.
The EISA and PCI 3c59x devices use an older DMA engine which is not capable of multi-segment DMA. DMA on these devices is not used.
The 3c529 is a MCA device, and doesn't support DMA.
The PCI 3c90x devices have multi-segment DMA capability, which is not supported by the ep driver. To use the DMA capabilities of these cards, the ex(4) driver must be used.
The PCI 3c90xB devices are not supported by the ep driver, as they do not include support for programmed I/O. These devices are supported by the ex(4) driver.
The 3c575 is a CardBus device, and is supported by ex(4) driver.
The first class is the “3c509” class. This includes the 3c509, 3c509B, 3c529, 3c579, 3c562, and 3c589. These devices can support 10BASE-T, 10BASE2, and 10BASE5. Available media will be displayed when the device is found by the kernel.
The second class is the “Vortex” class. This includes the 3c592, 3c579, 3c590, and 3c595. This class also includes the 3c900-TPO and 3c900-COMBO; they use the “Boomerang” chipset, but use Vortex-style media selection. These devices have many different media types varying by model. Some models have an external MII connector for connecting an external PHY. This is supported by means of the “manual” media type. Available media will be displayed when the device is found by the kernel.
The third class is the “Boomerang” class. This includes the 3c515, 3c905, and 3c574. These devices support media selection via MII. The 3c515 and 3c905 have an nsphy(4), and the 3c574 has a tqphy(4), for this purpose. See ifmedia(4) and mii(4) for more information.
The 3Com configuration utilities can `autosense' the active media and save it as default. The saved default medium is the medium that was active at the time the configuration utility was run. The ep driver does not yet re-autosense the active media at boot time. If the EEPROM autosense bit is set, the driver simply uses the media type sensed and saved when the configuration utility was run.
October 30, 2007 | NetBSD 6.1 |