tsi108_dev.c

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/*
 * tsi108/109 device setup code
 *
 * Maintained by Roy Zang < [email protected] >
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#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/platform_device.h>
#include <linux/of_net.h>
#include <asm/tsi108.h>

#include <linux/atomic.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/prom.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) {
        unsigned int size;
        const void *prop = of_get_property(tsi, "reg", &size);
        tsi108_csr_base = of_translate_address(tsi, prop);
        of_node_put(tsi);
    };
    return tsi108_csr_base;
}

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

EXPORT_SYMBOL(get_csrbase);
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 void *mac_addr;
        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;
        }

        mac_addr = of_get_mac_address(np);
        if (mac_addr)
            memcpy(tsi_eth_data.mac_addr, mac_addr, 6);

        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_get_property(phy, "txc-rxc-delay-disable", NULL))
            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);