/*
 * Copyright (c) 2006 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup sparc64
 * @{
 */
/** @file
 */

#include <arch/drivers/kbd.h>
#include <genarch/ofw/ofw_tree.h>
#include <genarch/ofw/fhc.h>
#include <genarch/ofw/ebus.h>
#include <console/console.h>
#include <ddi/irq.h>
#include <mm/page.h>
#include <arch/mm/page.h>
#include <arch/types.h>
#include <align.h>
#include <string.h>
#include <print.h>
#include <sysinfo/sysinfo.h>

#ifdef CONFIG_SUN_KBD
#include <genarch/kbrd/kbrd.h>
#endif

#ifdef CONFIG_Z8530
#include <genarch/drivers/z8530/z8530.h>
#endif

#ifdef CONFIG_NS16550
#include <genarch/drivers/ns16550/ns16550.h>
#endif

#ifdef CONFIG_SUN_KBD

#ifdef CONFIG_Z8530

static bool kbd_z8530_init(ofw_tree_node_t *node)
{
	const char *name = ofw_tree_node_name(node);
	
	if (str_cmp(name, "zs") != 0)
		return false;
	
	/*
	 * Read 'interrupts' property.
	 */
	ofw_tree_property_t *prop = ofw_tree_getprop(node, "interrupts");
	if ((!prop) || (!prop->value)) {
		printf("z8530: Unable to find interrupts property\n");
		return false;
	}
	
	uint32_t interrupts = *((uint32_t *) prop->value);
	
	/*
	 * Read 'reg' property.
	 */
	prop = ofw_tree_getprop(node, "reg");
	if ((!prop) || (!prop->value)) {
		printf("z8530: Unable to find reg property\n");
		return false;
	}
	
	size_t size = ((ofw_fhc_reg_t *) prop->value)->size;
	
	uintptr_t pa;
	if (!ofw_fhc_apply_ranges(node->parent,
	    ((ofw_fhc_reg_t *) prop->value), &pa)) {
		printf("z8530: Failed to determine address\n");
		return false;
	}
	
	inr_t inr;
	cir_t cir;
	void *cir_arg;
	if (!ofw_fhc_map_interrupt(node->parent,
	    ((ofw_fhc_reg_t *) prop->value), interrupts, &inr, &cir,
	    &cir_arg)) {
		printf("z8530: Failed to determine interrupt\n");
		return false;
	}
	
	/*
	 * We need to pass aligned address to hw_map().
	 * However, the physical keyboard address can
	 * be pretty much unaligned, depending on the
	 * underlying controller.
	 */
	uintptr_t aligned_addr = ALIGN_DOWN(pa, PAGE_SIZE);
	size_t offset = pa - aligned_addr;
	
	z8530_t *z8530 = (z8530_t *)
	    (hw_map(aligned_addr, offset + size) + offset);
	
	z8530_instance_t *z8530_instance = z8530_init(z8530, inr, cir, cir_arg);
	if (z8530_instance) {
		kbrd_instance_t *kbrd_instance = kbrd_init();
		if (kbrd_instance) {
			indev_t *sink = stdin_wire();
			indev_t *kbrd = kbrd_wire(kbrd_instance, sink);
			z8530_wire(z8530_instance, kbrd);
		}
	}
	
	/*
	 * This is the necessary evil until the userspace drivers are
	 * entirely self-sufficient.
	 */
	sysinfo_set_item_val("kbd", NULL, true);
	sysinfo_set_item_val("kbd.inr", NULL, inr);
	sysinfo_set_item_val("kbd.address.kernel", NULL,
	    (uintptr_t) z8530);
	sysinfo_set_item_val("kbd.address.physical", NULL, pa);
	sysinfo_set_item_val("kbd.type.z8530", NULL, true);
	
	return true;
}

#endif /* CONFIG_Z8530 */

#ifdef CONFIG_NS16550

static bool kbd_ns16550_init(ofw_tree_node_t *node)
{
	const char *name = ofw_tree_node_name(node);
	
	if (str_cmp(name, "su") != 0)
		return false;
	
	/*
	 * Read 'interrupts' property.
	 */
	ofw_tree_property_t *prop = ofw_tree_getprop(node, "interrupts");
	if ((!prop) || (!prop->value)) {
		printf("ns16550: Unable to find interrupts property\n");
		return false;
	}
	
	uint32_t interrupts = *((uint32_t *) prop->value);
	
	/*
	 * Read 'reg' property.
	 */
	prop = ofw_tree_getprop(node, "reg");
	if ((!prop) || (!prop->value)) {
		printf("ns16550: Unable to find reg property\n");
		return false;
	}
	
	size_t size = ((ofw_ebus_reg_t *) prop->value)->size;
	
	uintptr_t pa;
	if (!ofw_ebus_apply_ranges(node->parent,
	    ((ofw_ebus_reg_t *) prop->value), &pa)) {
		printf("ns16550: Failed to determine address\n");
		return false;
	}
	
	inr_t inr;
	cir_t cir;
	void *cir_arg;
	if (!ofw_ebus_map_interrupt(node->parent,
	    ((ofw_ebus_reg_t *) prop->value), interrupts, &inr, &cir,
	    &cir_arg)) {
		printf("ns16550: Failed to determine interrupt\n");
		return false;
	}
	
	/*
	 * We need to pass aligned address to hw_map().
	 * However, the physical keyboard address can
	 * be pretty much unaligned, depending on the
	 * underlying controller.
	 */
	uintptr_t aligned_addr = ALIGN_DOWN(pa, PAGE_SIZE);
	size_t offset = pa - aligned_addr;
	
	ns16550_t *ns16550 = (ns16550_t *)
	   (hw_map(aligned_addr, offset + size) + offset);
	
	ns16550_instance_t *ns16550_instance = ns16550_init(ns16550, inr, cir, cir_arg);
	if (ns16550_instance) {
		kbrd_instance_t *kbrd_instance = kbrd_init();
		if (kbrd_instance) {
			indev_t *sink = stdin_wire();
			indev_t *kbrd = kbrd_wire(kbrd_instance, sink);
			ns16550_wire(ns16550_instance, kbrd);
		}
	}
	
	/*
	 * This is the necessary evil until the userspace drivers are
	 * entirely self-sufficient.
	 */
	sysinfo_set_item_val("kbd", NULL, true);
	sysinfo_set_item_val("kbd.inr", NULL, inr);
	sysinfo_set_item_val("kbd.address.kernel", NULL,
	    (uintptr_t) ns16550);
	sysinfo_set_item_val("kbd.address.physical", NULL, pa);
	sysinfo_set_item_val("kbd.type.ns16550", NULL, true);
	
	return true;
}

#endif /* CONFIG_NS16550 */

/** Initialize keyboard.
 *
 * Traverse OpenFirmware device tree in order to find necessary
 * info about the keyboard device.
 *
 * @param node Keyboard device node.
 *
 */
void kbd_init(ofw_tree_node_t *node)
{
#ifdef CONFIG_Z8530
	kbd_z8530_init(node);
#endif
	
#ifdef CONFIG_NS16550
	kbd_ns16550_init(node);
#endif
}

#endif /* CONFIG_SUN_KBD */

/** @}
 */