// devices.cpp
// Device subsystem for HOS
// Author: Josh Holtrop
// Date: 05/11/05
// Modified: 05/11/05

#define _HOS_CPP_ _HOS_CPP_

#include "hos_defines.h"
#include "devices.h"
#include "char/misc_char.h"
#include "char/vconsole.h"
#include "block/ramdisk.h"

DeviceDriver *drivers[256];

int	devices_init()
{
	drivers[MAJOR_MISC_CHAR] = new MiscChar();
	drivers[MAJOR_VCONSOLE] = new VConsoleDriver();
	drivers[MAJOR_RAMDISK] = new Ramdisk();
	return 0;
}

int	block_read(major_t major, minor_t minor, u32_t blockStart, u32_t blocks, void *buffer)
{
	if (drivers[major & 0xFF])
		return drivers[major & 0xFF]->block_read(minor, blockStart, blocks, buffer);
	return DEV_INVALID_DEVICE;
}

int	block_write(major_t major, minor_t minor, u32_t blockStart, u32_t blocks, void *buffer)
{
	if (drivers[major & 0xFF])
		return drivers[major & 0xFF]->block_write(minor, blockStart, blocks, buffer);
	return DEV_INVALID_DEVICE;
}

int	char_read(major_t major, minor_t minor)
{
	if (drivers[major & 0xFF])
		return drivers[major & 0xFF]->char_read(minor);
	return DEV_INVALID_DEVICE;
}

int	char_write(major_t major, minor_t minor, int c)
{
	if (drivers[major & 0xFF])
		return drivers[major & 0xFF]->char_write(minor, c);
	return DEV_INVALID_DEVICE;
}

DeviceDriver::DeviceDriver() {}
DeviceDriver::~DeviceDriver() {}

int DeviceDriver::char_read(minor_t minor)
{ return DEV_INVALID_ACCESS; }

int DeviceDriver::char_write(minor_t minor, int c)
{ return DEV_INVALID_ACCESS; }

int DeviceDriver::block_read(minor_t minor, u32_t blockStart, u32_t blocks, void *buffer)
{ return DEV_INVALID_ACCESS; }

int DeviceDriver::block_write(minor_t minor, u32_t blockStart, u32_t blocks, void *buffer)
{ return DEV_INVALID_ACCESS; }