source: mainline/kernel/arch/sparc64/src/drivers/tty.c

/*
 * Copyright (c) 2019 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 kernel_sparc64
 * @{
 */
/** @file
 */

#include <genarch/ofw/ofw_tree.h>
#include <genarch/ofw/ebus.h>
#include <console/console.h>
#include <genarch/srln/srln.h>
#include <ddi/irq.h>
#include <typedefs.h>
#include <align.h>
#include <str.h>
#include <log.h>

#ifdef CONFIG_SUN_TTY
#include <arch/drivers/tty.h>
#endif

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

#ifdef CONFIG_SUN_TTY

#ifdef CONFIG_NS16550

static bool tty_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)) {
                log(LF_ARCH, LVL_ERROR,
                    "ns16550: Unable to find interrupts property");
                return false;
        }

        uint32_t interrupts = *((uint32_t *) prop->value);

        /*
         * Read 'reg' property.
         */
        prop = ofw_tree_getprop(node, "reg");
        if ((!prop) || (!prop->value)) {
                log(LF_ARCH, LVL_ERROR,
                    "ns16550: Unable to find reg property");
                return false;
        }

        uintptr_t pa = 0; // Prevent -Werror=maybe-uninitialized
        if (!ofw_ebus_apply_ranges(node->parent,
            ((ofw_ebus_reg_t *) prop->value), &pa)) {
                log(LF_ARCH, LVL_ERROR,
                    "ns16550: Failed to determine address");
                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)) {
                log(LF_ARCH, LVL_ERROR,
                    "ns16550: Failed to determine interrupt");
                return false;
        }

        outdev_t *ns16550_out;
        ns16550_instance_t *ns16550_instance = ns16550_init((ioport8_t *) pa, 0,
            inr, cir, cir_arg, &ns16550_out);
        if (ns16550_instance) {
                srln_instance_t *srln_instance = srln_init();
                if (srln_instance) {
                        indev_t *sink = stdin_wire();
                        indev_t *srln = srln_wire(srln_instance, sink);
                        ns16550_wire(ns16550_instance, srln);
                }
                stdout_wire(ns16550_out);
        }

        return true;
}

#endif /* CONFIG_NS16550 */

/** Initialize tty.
 *
 * Traverse OpenFirmware device tree in order to find necessary
 * info about the keyboard device.
 *
 * @param node Keyboard device node.
 *
 */
void tty_init(ofw_tree_node_t *node)
{
#ifdef CONFIG_NS16550
        tty_ns16550_init(node);
#endif
}

#endif /* CONFIG_SUN_TTY */

/** @}
 */