Hello, after having a first glance on the MMC/SD driver source, I'm unsure how to handle the following requirement (System: Kernel 2.6.30 on i386). I'm trying to integrate a SD card with a 'command system expansion' via switch-command (see 'sd card association', 'physical layer simplified spec 2.00', chapter 4.3.12). The additional commands are used to communicate with a specialized controller within the SD card (1), as well as access hidden memory in a secure way (2). Because of the multi functionality (ordinary SD + 2 additional features) and not SDIO, I'd like to get a clue where to start? The first extension might be handled via ioctrl(), so that a user space applications could use it. The second one should be accessible as a device, which can be mounted to apply a file system. So there are some questions: - Do I have to write a complete new driver? - Can I rely on the existing driver? - Is there already something implemented? - Where to place it? - Do I need a new major device id (in case of a new driver) or just a minor one for mounting? Another problem might be, that a flash access (read/write) could intercept the extended communication and vice versa? In the hope to get a little bit of light in the dark, TIA Norman -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
