Return to hostio.c CVS log

Up to [local] / prex-old / dev / arm / cats

Start implementing basic hardware support for CATS, based on new autoconfiguration
mechanism. This effectively uses bus_space to abstract children of parents.
Some info about these drivers:
hostio is a host memory-mapped i/o - one and only child of 'root';
footbridge is just a proxy for now;
fuart is a DC21285 UART driver which fills uart_attach_args and attaches
com, which is machine independent driver;

This all is not finished yet (just quick hacks), but commit it so i could work at home.

/*
 * $Id: hostio.c,v 1.1 2008/08/08 13:18:16 nbrk Exp $
 */
#include <driver.h>
#include <bus.h>

#include "hostiovar.h"

/*
 * Autoconf glue.
 */
int	hostio_match(struct device *parent, void *aux);
int	hostio_attach(struct device *parent, struct device *self, void *aux);

struct driver hostio_drv = {
	"hostio",					/* name */
	sizeof(struct hostio_softc),/* datasize */
	hostio_match,				/* match */
	hostio_attach,				/* attach */
	NULL,						/* detach */
	-1							/* nunits XXX */
};



int
hostio_match(struct device *parent, void *aux)
{
	return(1);
}


int
hostio_attach(struct device *parent, struct device *self, void *aux)
{
	struct hostio_softc	*sc = self->dv_data;

	printk("\n");

	sc->sc_iot = &hostio_bs_tag;

	/*
	 * Nothing to do. Just pass our bus_space_tag_t to upper layers.
	 */
	config_search_children(self, sc->sc_iot);

	return(0);
}


int
hostio_map(void *cookie, bus_addr_t addr, bus_size_t size, int flags, bus_space_handle_t *ioh)
{
	/* XXX */

/*	*ioh = kmem_map(addr, size); */
	*ioh = addr;

	return(0);
}


uint8_t
hostio_read_1(void *cookie, bus_space_handle_t ioh, bus_size_t off)
{
	uint8_t	d;

	d = *(volatile uint32_t *)(ioh + off);

	return(d);
}


uint16_t
hostio_read_2(void *cookie, bus_space_handle_t ioh, bus_size_t off)
{
	uint16_t	d;

	d = *(volatile uint32_t *)(ioh + off);

	return(d);
}


uint32_t
hostio_read_4(void *cookie, bus_space_handle_t ioh, bus_size_t off)
{
	uint32_t	d;

	d = *(volatile uint32_t *)(ioh + off);

	return(d);
}


void
hostio_write_1(void *cookie, bus_space_handle_t ioh, bus_size_t off, uint8_t data)
{
	*(volatile uint32_t *)(ioh + off) = data;
}


void
hostio_write_2(void *cookie, bus_space_handle_t ioh, bus_size_t off, uint16_t data)
{
	*(volatile uint32_t *)(ioh + off) = data;
}


void
hostio_write_4(void *cookie, bus_space_handle_t ioh, bus_size_t off, uint32_t data)
{
	*(volatile uint32_t *)(ioh + off) = data;
}