#include <kernel/hardware/ubc.h>
#include <kernel/hardware/power.h>
#include <kernel/bits/driver.h>
#include <kernel/util/extra.h>
#include <string.h>

// Internal hardware context
struct __sh7305_ubc_context ubc_context;

// Internal global
int ubc_driver_is_installed = 0;

//@note: we known that Casio doesn't use the UBC module
static void sh7305_ubc_driver_install(void)
{
	extern uint32_t vhex_dbr;
	extern uint32_t bubc_ram;
	extern uint32_t bubc_rom;
	extern uint32_t subc;

	// Check multiple installation
	if (ubc_driver_is_installed != 0)
		return;

	// Dump UBC handler
	memcpy(&bubc_ram, &bubc_rom, (size_t)&subc);

	// Set the DBR
	dbr_set(&vhex_dbr);

	// Start User Break Controller
	SH7305_POWER.MSTPCR0.UBC = 0;

	// Default initialization
	SH7305_UBC.CBR0.MFI = 0b000000;
	SH7305_UBC.CBR0.CE = 0;
	SH7305_UBC.CBR1.MFI = 0b000000;
	SH7305_UBC.CBR1.CE = 0;
	SH7305_UBC.CBCR.UBDE = 1;
}

static void sh7305_ubc_driver_uninstall(void)
{
	// Nothing for now
	// TODO: Casio seems to stop UBC module when power off occur
	// SO, restore context if needed (?)
}

// Create driver object
VHEX_DRIVER(3, driver_ubc_sh7305) = {
	.arch = MPU_SH7305,
	.install = &sh7305_ubc_driver_install,
	.uninstall = &sh7305_ubc_driver_uninstall,
	.name = "intc"
};