// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * tsi108/109 device setup code
 *
 * Maintained by Roy Zang < tie-fei.zang@freescale.com >
 */

#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/major.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/export.h>
#include <linux/device.h>
#include <linux/etherdevice.h>
#include <linux/platform_device.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_net.h>
#include <asm/tsi108.h>

#include <linux/atomic.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <mm/mmu_decl.h>

#undef DEBUG

#ifdef DEBUG
#define DBG(fmt...) do { printk(fmt); } while(0)
#else
#define DBG(fmt...) do { } while(0)
#endif

static phys_addr_t tsi108_csr_base = -1;

phys_addr_t get_csrbase(void)
{
        struct device_node *tsi;

        if (tsi108_csr_base != -1)
                return tsi108_csr_base;

        tsi = of_find_node_by_type(NULL, "tsi-bridge");
        if (tsi) {
                struct resource res;
                of_address_to_resource(tsi, 0, &res);
                tsi108_csr_base = res.start;
                of_node_put(tsi);
        }
        return tsi108_csr_base;
}
EXPORT_SYMBOL(get_csrbase);

u32 get_vir_csrbase(void)
{
        return (u32) (ioremap(get_csrbase(), 0x10000));
}
EXPORT_SYMBOL(get_vir_csrbase);

static int __init tsi108_eth_of_init(void)
{
        struct device_node *np;
        unsigned int i = 0;
        struct platform_device *tsi_eth_dev;
        struct resource res;
        int ret;

        for_each_compatible_node(np, "network", "tsi108-ethernet") {
                struct resource r[2];
                struct device_node *phy, *mdio;
                hw_info tsi_eth_data;
                const unsigned int *phy_id;
                const phandle *ph;

                memset(r, 0, sizeof(r));
                memset(&tsi_eth_data, 0, sizeof(tsi_eth_data));

                ret = of_address_to_resource(np, 0, &r[0]);
                DBG("%s: name:start->end = %s:%pR\n",
                    __func__, r[0].name, &r[0]);
                if (ret)
                        goto err;

                r[1].name = "tx";
                r[1].start = irq_of_parse_and_map(np, 0);
                r[1].end = irq_of_parse_and_map(np, 0);
                r[1].flags = IORESOURCE_IRQ;
                DBG("%s: name:start->end = %s:%pR\n",
                        __func__, r[1].name, &r[1]);

                tsi_eth_dev =
                    platform_device_register_simple("tsi-ethernet", i++, &r[0],
                                                    1);

                if (IS_ERR(tsi_eth_dev)) {
                        ret = PTR_ERR(tsi_eth_dev);
                        goto err;
                }

                of_get_mac_address(np, tsi_eth_data.mac_addr);

                ph = of_get_property(np, "mdio-handle", NULL);
                mdio = of_find_node_by_phandle(*ph);
                ret = of_address_to_resource(mdio, 0, &res);
                of_node_put(mdio);
                if (ret)
                        goto unreg;

                ph = of_get_property(np, "phy-handle", NULL);
                phy = of_find_node_by_phandle(*ph);

                if (phy == NULL) {
                        ret = -ENODEV;
                        goto unreg;
                }

                phy_id = of_get_property(phy, "reg", NULL);

                tsi_eth_data.regs = r[0].start;
                tsi_eth_data.phyregs = res.start;
                tsi_eth_data.phy = *phy_id;
                tsi_eth_data.irq_num = irq_of_parse_and_map(np, 0);

                /* Some boards with the TSI108 bridge (e.g. Holly)
                 * have a miswiring of the ethernet PHYs which
                 * requires a workaround.  The special
                 * "txc-rxc-delay-disable" property enables this
                 * workaround.  FIXME: Need to port the tsi108_eth
                 * driver itself to phylib and use a non-misleading
                 * name for the workaround flag - it's not actually to
                 * do with the model of PHY in use */
                if (of_property_read_bool(phy, "txc-rxc-delay-disable"))
                        tsi_eth_data.phy_type = TSI108_PHY_BCM54XX;
                of_node_put(phy);

                ret =
                    platform_device_add_data(tsi_eth_dev, &tsi_eth_data,
                                             sizeof(hw_info));
                if (ret)
                        goto unreg;
        }
        return 0;
unreg:
        platform_device_unregister(tsi_eth_dev);
err:
        of_node_put(np);
        return ret;
}

arch_initcall(tsi108_eth_of_init);