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Writing device drivers in Linux: A brief tutorial
http://freesoftwaremagazine.com/articles/drivers_linux/
To achieve this, a file (which will be used to access the device driver) must be created, by typing the following command as root: # mknod /dev/memory c 60 0 In the above, c means that a char device is to be created, 60 is the major number and 0 is the minor number.
Writing an ALSA Driver — The Linux Kernel documentation
https://www.kernel.org/doc/html/v4.17/sound/kernel-api/writing-an-alsa-driver.html
strcpy (card->driver, "My Chip"); strcpy (card->shortname, "My Own Chip 123"); sprintf (card->longname, "%s at 0x%lx irq %i", card->shortname, chip->ioport, chip->irq); The driver field holds the minimal ID string of the chip. This is used by alsa-lib’s configurator, so keep it …
Writing USB Device Driver in Linux - Stack Overflow
https://stackoverflow.com/questions/5973425/writing-usb-device-driver-in-linux
libusb is useful and easy to get up and running. I would suggest that you start there, especially if you haven't written Linux drivers in a while. Use libusb to understand what the signalling protocol is for the Roland GR-55 and do some experiments. USB supports several types of logical connections over the same physical wire.
Writing an ALSA Driver — The Linux Kernel documentation
https://kernel.org/doc/html/v5.16-rc5/sound/kernel-api/writing-an-alsa-driver.html
The Linux Kernel 5.16.0-rc5 The Linux kernel user’s and administrator’s guide
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