// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * This contain platform specific code for APM PPC460EX based Canyonlands
 * board.
 *
 * Copyright (c) 2010, Applied Micro Circuits Corporation
 * Author: Rupjyoti Sarmah <rsarmah@apm.com>
 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/pci-bridge.h>
#include <asm/ppc4xx.h>
#include <asm/udbg.h>
#include <asm/uic.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/delay.h>
#include "44x.h"

#define BCSR_USB_EN     0x11

static const struct of_device_id ppc460ex_of_bus[] __initconst = {
        { .compatible = "ibm,plb4", },
        { .compatible = "ibm,opb", },
        { .compatible = "ibm,ebc", },
        { .compatible = "simple-bus", },
        {},
};

static int __init ppc460ex_device_probe(void)
{
        of_platform_bus_probe(NULL, ppc460ex_of_bus, NULL);

        return 0;
}
machine_device_initcall(canyonlands, ppc460ex_device_probe);

/* Using this code only for the Canyonlands board.  */

static int __init ppc460ex_probe(void)
{
        pci_set_flags(PCI_REASSIGN_ALL_RSRC);

        return 1;
}

/* USB PHY fixup code on Canyonlands kit. */

static int __init ppc460ex_canyonlands_fixup(void)
{
        u8 __iomem *bcsr ;
        void __iomem *vaddr;
        struct device_node *np;
        int ret = 0;

        np = of_find_compatible_node(NULL, NULL, "amcc,ppc460ex-bcsr");
        if (!np) {
                printk(KERN_ERR "failed did not find amcc, ppc460ex bcsr node\n");
                return -ENODEV;
        }

        bcsr = of_iomap(np, 0);
        of_node_put(np);

        if (!bcsr) {
                printk(KERN_CRIT "Could not remap bcsr\n");
                ret = -ENODEV;
                goto err_bcsr;
        }

        np = of_find_compatible_node(NULL, NULL, "ibm,ppc4xx-gpio");
        if (!np) {
                printk(KERN_ERR "failed did not find ibm,ppc4xx-gpio node\n");
                return -ENODEV;
        }

        vaddr = of_iomap(np, 0);
        of_node_put(np);

        if (!vaddr) {
                printk(KERN_CRIT "Could not get gpio node address\n");
                ret = -ENODEV;
                goto err_gpio;
        }
        /* Disable USB, through the BCSR7 bits */
        setbits8(&bcsr[7], BCSR_USB_EN);

        /* Wait for a while after reset */
        msleep(100);

        /* Enable USB here */
        clrbits8(&bcsr[7], BCSR_USB_EN);

        /*
         * Configure multiplexed gpio16 and gpio19 as alternate1 output
         * source after USB reset. In this configuration gpio16 will be
         * USB2HStop and gpio19 will be USB2DStop. For more details refer to
         * table 34-7 of PPC460EX user manual.
         */
        setbits32((vaddr + GPIO0_OSRH), 0x42000000);
        setbits32((vaddr + GPIO0_TSRH), 0x42000000);
err_gpio:
        iounmap(vaddr);
err_bcsr:
        iounmap(bcsr);
        return ret;
}
machine_device_initcall(canyonlands, ppc460ex_canyonlands_fixup);
define_machine(canyonlands) {
        .name = "Canyonlands",
        .compatible = "amcc,canyonlands",
        .probe = ppc460ex_probe,
        .progress = udbg_progress,
        .init_IRQ = uic_init_tree,
        .get_irq = uic_get_irq,
        .restart = ppc4xx_reset_system,
};