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Created driver shell

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Mickey Malone
2021-02-06 16:34:34 -06:00
parent b076133178
commit b4d5453fd4
1 changed files with 94 additions and 7 deletions
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101
driver/pico_rng.c
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@@ -1,23 +1,110 @@
#include <linux/module.h> #include <linux/module.h>
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/usb.h>
#include <linux/ioctl.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/semaphore.h>
#include <asm/uaccess.h>
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mickey Malone"); MODULE_AUTHOR("Mickey Malone");
MODULE_DESCRIPTION("Random number generator using a Raspberry Pi Pico"); MODULE_DESCRIPTION("Random number generator using a Raspberry Pi Pico");
MODULE_VERSION("1.0"); MODULE_VERSION("1.0");
static int __init driver_init(void) /**
* Static constants
**/
#define VENDOR_ID 0x0
#define PRODUCT_ID 0x4
#define SC_MINOR_BASE 31
/**
* Helper macros
**/
#define LOGGER_INFO(fmt, args ...) printk( KERN_INFO "[info] %s(%d): " fmt, __FUNCTION__, __LINE__, ## args)
#define LOGGER_ERR(fmt, args ...) printk( KERN_ERR "[err] %s(%d): " fmt, __FUNCTION__, __LINE__, ## args)
#define LOGGER_WARN(fmt, args ...) printk( KERN_ERR "[warn] %s(%d): " fmt, __FUNCTION__, __LINE__, ## args)
#define LOGGER_DEBUG(fmt, args ...) if (debug == 1) { printk( KERN_DEBUG "[debug] %s(%d): " fmt, __FUNCTION__, __LINE__, ## args); }
/**
* Prototype Functions
**/
static int pico_rng_usb_probe(struct usb_interface *interface, const struct usb_device_id *id);
static void pico_rng_usb_disconnect(struct usb_interface *interface);
static int __init pico_rng_driver_init(void);
static void __exit pico_rng_driver_exit(void);
/**
* Data structure of the USB vid:pid device that we will support
**/
static struct usb_device_id pico_rng_usb_table [] = {
{ USB_DEVICE(VENDOR_ID, PRODUCT_ID) },
{ }
};
/**
* USB driver data structure
**/
static struct usb_driver pico_rng_usb_driver = {
.name = "pico_rng",
.id_table = pico_rng_usb_table,
.probe = pico_rng_usb_probe,
.disconnect = pico_rng_usb_disconnect,
};
/**
* USB: Probe
* This method will be called if the device we plug in matches the vid:pid we are listening for
**/
static int pico_rng_usb_probe(struct usb_interface *interface, const struct usb_device_id *id)
{ {
printk(KERN_INFO "Raspberry Pi Pico RNG\n"); LOGGER_INFO("pico rng usb device initialized\n");
return 0;
// TODO: Setup USB device, create seed thread to continuously gather entropy from device.
return 0;
} }
static void __exit driver_exit(void) /**
* USB:disconnect
* This method is used to cleanup everything after the device is disconnected
**/
static void pico_rng_usb_disconnect(struct usb_interface *interface)
{ {
LOGGER_INFO("pico rng usb device disconnected\n");
}
static int __init pico_rng_driver_init(void)
{
int result;
LOGGER_INFO("pico rng driver debut\n");
result = usb_register(&pico_rng_usb_driver);
if(result)
{
LOGGER_ERR("registering pico rng driver failed\n");
}
else
{
LOGGER_INFO("pico rng driver registered successfully\n");
}
return result;
}
static void __exit pico_rng_driver_exit(void)
{
usb_deregister(&pico_rng_usb_driver);
return; return;
} }
module_init(driver_init); module_init(pico_rng_driver_init);
module_exit(driver_exit); module_exit(pico_rng_driver_exit);