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What do they all do!?
by yrro 7y ago
What do they all do!?
- derefr 7y agoI would guess that they're basically directly exposing the modem's ACPI device subtree over USB, the same way they would over PCIe. So you've got one endpoint corresponding to the data TX DMA region; one corresponding to the data RX DMA region; one corresponding to the command IO stream input; one corresponding to a command error channel; one corresponding to each different axis of mode-setting; etc.
- marcosdumay 7y agoWell, this design is better than the alternative. Composing simple devices in a hierarchical address is much better than the old complex devices that had everything explained on the same datasheet, but it had 300 pages and no two devices were alike.