Re: read() via USB bus
From: Oliver Neukum <oneukum@suse.com>
Date: 2021-08-09 08:15:40
Also in:
linux-usb, lkml
On 09.08.21 09:58, Muni Sekhar wrote:
Hi all, PCIe memory mapped registers can be read via readb(), readw(), readl() kernel API's. Similarly what are the kernel API to read the device registers via USB bus
Hi, I am afraid this is based on a fundamental misunderstanding on how USB works. It is based on passing messages, not reading and writing registers. USB devices are primarily based on endpoints, not registers. A literal answer to your question would point you to the clear/set/get_feature standard requests of chapter 9 of the specification, but that really will not help you, as you are making assumption that fundamentally do not apply. I hope this list stays friendly to newcomers and we will answer specific questions, but at this point I must advise you to first read an introductory book. HTH Oliver _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies