kernel supported driver functions

all-functions

The OS functions supported at kernel level are, of course, only those functions programmed inside it:

kmalloc(), kfree(): memory management

cli(), sti(): enable/disable interrupts

add_timer(), init_timer(), del_timer(): timing management

request_irq(), free_irq(): irq management

inb_p(), outb_p(): port management

memcpy_*fs(): data management

printk(): input/output

register_*dev(), unregister_*dev(): device management

*sleep_on(), wake_up*(): process management

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so these are maxium functions supported by kernel used in probe function of driver.

we will write sample program for each function to understand its usage.