source: rtems-libbsd/rtemsbsd/sys/powerpc/compat.c @ 81fc57d

#include <machine/rtems-bsd-kernel-space.h>
#include <rtems/bsd/local/opt_dpaa.h>

/*
 * Copyright (c) 2015 embedded brains GmbH
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "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 COPYRIGHT
 * OWNER OR CONTRIBUTORS 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.
 */

#include <linux/slab.h>

MALLOC_DEFINE(M_KMALLOC, "kmalloc", "Linux kmalloc compatibility");

#include <bsp/fdt.h>

#include <linux/of.h>

const void *
of_get_property(const struct device_node *dn, const char *name, int *len)
{
        const void *fdt = bsp_fdt_get();

        return (fdt_getprop(fdt, dn->offset, name, len));
}

int
of_property_read_u32_array(const struct device_node *dn, const char *name,
    u32 *vals, size_t n)
{
        const u32 *prop_vals;
        int len;

        prop_vals = of_get_property(dn, name, &len);
        if (prop_vals == NULL) {
                return (-EINVAL);
        }

        if (len != n * sizeof(*vals)) {
                return (-EOVERFLOW);
        }

        while (n > 0) {
                *vals = fdt32_to_cpu(*prop_vals);
                ++vals;
                ++prop_vals;
                --n;
        }

        return (0);
}

bool
of_device_is_available(const struct device_node *dn)
{
        const char *status;
        int len;

        status = of_get_property(dn, "status", &len);
        return (status == NULL ||
            (len > 0 && (strcmp(status, "okay") == 0 ||
            strcmp(status, "ok") == 0)));
}

int
of_device_is_compatible(const struct device_node *dn, const char *name)
{
        const void *fdt = bsp_fdt_get();

        return (fdt_node_check_compatible(fdt, dn->offset, name) == 0);
}

struct device_node *
of_find_node_by_path(struct device_node *dns, const char *path)
{
        const void *fdt = bsp_fdt_get();
        int node;

        memset(dns, 0, sizeof(*dns));

        node = fdt_path_offset(fdt, path);
        if (node < 0)
                return (NULL);

        dns->offset = node;
        return (dns);
}

struct device_node *
of_find_compatible_node(struct device_node *dns, const struct device_node *dn,
    const char *type, const char *compatible)
{
        const void *fdt = bsp_fdt_get();
        int node;

        (void)type;

        if (dn != NULL) {
                node = dn->offset;
        } else {
                node = 0;
        }

        memset(dns, 0, sizeof(*dns));

        while (1) {
                int err;

                node = fdt_next_node(fdt, node, NULL);
                if (node < 0)
                        return (NULL);

                err = fdt_node_check_compatible(fdt, node, compatible);
                if (err == 0) {
                        dns->offset = node;
                        return (dns);
                }
        }
}

uint64_t
of_read_number(const uint32_t *cell, int size)
{
        uint64_t number;

        number = 0;

        while (size > 0) {
                number = (number << 32) | fdt32_to_cpu(*cell);
                ++cell;
                --size;
        }

        return (number);
}

struct device_node *
of_parse_phandle(struct device_node *dns, struct device_node *dn,
    const char *phandle_name, int index)
{
        const void *fdt = bsp_fdt_get();
        const fdt32_t *phandle;
        int node;
        int len;

        phandle = fdt_getprop(fdt, dn->offset, phandle_name, &len);
        if (phandle == NULL || (len / (int) sizeof(*phandle)) <= index) {
                return (NULL);
        }

        node = fdt_node_offset_by_phandle(fdt, fdt32_to_cpu(phandle[index]));
        if (node < 0) {
                return (NULL);
        }

        dns->offset = node;
        dns->full_name = NULL;
        return (dns);
}

int
of_count_phandle_with_args(struct device_node *dn, const char *list_name,
    const char *cells_name)
{
        const void *fdt = bsp_fdt_get();
        const fdt32_t *phandle;
        int len;

        BSD_ASSERT(cells_name == NULL);

        phandle = fdt_getprop(fdt, dn->offset, list_name, &len);
        if (phandle == NULL) {
                return (-ENOENT);
        }

        return (len / (int)sizeof(*phandle));
}

#include <linux/of_address.h>
#include <linux/of_irq.h>

static int
get_cells(const void *fdt, int node, const char *name)
{
        const fdt32_t *c;
        int len;
        int val;

        do {
                c = fdt_getprop(fdt, node, name, &len);
                if (c != NULL) {
                        if (len != sizeof(*c))
                                return (-EINVAL);
                        val = fdt32_to_cpu(*c);
                        if (val <= 0 ||
                            val > sizeof(resource_size_t) / sizeof(*c))
                                return (-EINVAL);
                        return (val);
                }
                node = fdt_parent_offset(fdt, node);
        } while (node >= 0);

        return (-EINVAL);
}

static int
get_address_cells(const void *fdt, int node)
{

        return (get_cells(fdt, node, "#address-cells"));
}

static int
get_size_cells(const void *fdt, int node)
{

        return (get_cells(fdt, node, "#size-cells"));
}

int
of_n_addr_cells(struct device_node *dn)
{

        return (get_address_cells(bsp_fdt_get(), dn->offset));
}

int
of_n_size_cells(struct device_node *dn)
{

        return (get_size_cells(bsp_fdt_get(), dn->offset));
}

int
of_address_to_resource(struct device_node *dn, int index,
    struct resource *res)
{
        const void *fdt = bsp_fdt_get();
        int ac;
        int sc;
        int len;
        const fdt32_t *p;
        int i;

        memset(res, 0, sizeof(*res));

        ac = get_address_cells(fdt, dn->offset);
        if (ac < 0)
                return (-EINVAL);

        sc = get_size_cells(fdt, dn->offset);
        if (sc < 0)
                return (-EINVAL);

        p = fdt_getprop(fdt, dn->offset, "reg", &len);
        if (p == NULL)
                return (-EINVAL);

        len /= sizeof(*p);
        i = index * (ac + sc);
        if (i + ac + sc > len)
                return (-EINVAL);

        while (ac > 0) {
                res->start = (res->start << 32) | fdt32_to_cpu(p[i]);
                ++i;
                --ac;
        }

        while (sc > 0) {
                res->end = (res->end << 32) | fdt32_to_cpu(p[i]);
                ++i;
                --sc;
        }
        res->end += res->start;

        return (0);
}

int
of_irq_to_resource(struct device_node *dn, int index,
    struct resource *res)
{
        const void *fdt = bsp_fdt_get();
        int len;
        const fdt32_t *p;
        int i;
        int irq;

        if (res != NULL)
                memset(res, 0, sizeof(*res));

        p = fdt_getprop(fdt, dn->offset, "interrupts", &len);
        if (p == NULL)
                return (-EINVAL);

        i = index * 16;
        if (i + 16 > len)
                return (-EINVAL);

        irq = (int)fdt32_to_cpu(p[i / sizeof(*p)]);
#ifdef __PPC__
        /* FIXME */
        irq -= 16;
#endif

        if (res != NULL) {
                res->start = irq;
                res->end = irq;
        }

        return (irq);
}

#include <linux/of_net.h>
#include <linux/if_ether.h>
#include <linux/phy.h>

static const char * const phy_modes[] = {
        [PHY_INTERFACE_MODE_MII]        = "mii",
        [PHY_INTERFACE_MODE_GMII]       = "gmii",
        [PHY_INTERFACE_MODE_SGMII]      = "sgmii",
        [PHY_INTERFACE_MODE_TBI]        = "tbi",
        [PHY_INTERFACE_MODE_REVMII]     = "rev-mii",
        [PHY_INTERFACE_MODE_RMII]       = "rmii",
        [PHY_INTERFACE_MODE_RGMII]      = "rgmii",
        [PHY_INTERFACE_MODE_RGMII_ID]   = "rgmii-id",
        [PHY_INTERFACE_MODE_RGMII_RXID] = "rgmii-rxid",
        [PHY_INTERFACE_MODE_RGMII_TXID] = "rgmii-txid",
        [PHY_INTERFACE_MODE_RTBI]       = "rtbi",
        [PHY_INTERFACE_MODE_SMII]       = "smii",
        [PHY_INTERFACE_MODE_XGMII]      = "xgmii",
        [PHY_INTERFACE_MODE_MOCA]       = "moca",
        [PHY_INTERFACE_MODE_QSGMII]     = "qsgmii"
};

int
of_get_phy_mode(struct device_node *dn)
{
        const void *fdt = bsp_fdt_get();
        int len;
        const char *p;
        int i;

        p = fdt_getprop(fdt, dn->offset, "phy-mode", &len);

        if (p == NULL) {
                p = fdt_getprop(fdt, dn->offset, "phy-connection-type", &len);
        }

        if (p == NULL) {
                return (-ENODEV);
        }

        for (i = 0; i < ARRAY_SIZE(phy_modes); i++) {
                if (phy_modes[i] != NULL && strcmp(p, phy_modes[i]) == 0) {
                        return (i);
                }
        }

        return (-ENODEV);
}

static const void *
get_mac_address(struct device_node *dn, const char *name)
{
        const void *fdt = bsp_fdt_get();
        int len;
        const fdt32_t *p;

        p = fdt_getprop(fdt, dn->offset, name, &len);
        if (p == NULL || len != ETH_ALEN) {
                return (NULL);
        }

        return (p);
}

const void *
of_get_mac_address(struct device_node *dn)
{
        const void *addr;

        addr = get_mac_address(dn, "mac-address");
        if (addr != NULL) {
                return addr;
        }

        return get_mac_address(dn, "local-mac-address");
}

#include <linux/interrupt.h>

struct arg_wrapper {
        irq_handler_t handler;
        unsigned int irq;
        void *arg;
};

static void
handler_wrapper(void *arg)
{
        struct arg_wrapper *aw = arg;

        (*aw->handler)(aw->irq, aw->arg);
}

int __must_check
request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags,
    const char *name, void *arg)
{
        struct arg_wrapper *aw;
        rtems_status_code sc;

        aw = kmalloc(sizeof(*aw), GFP_KERNEL);
        if (aw == NULL)
                return (-ENOMEM);

        aw->handler = handler;
        aw->irq = irq;
        aw->arg = arg;
        sc = rtems_interrupt_server_handler_install(RTEMS_ID_NONE, irq, name,
            RTEMS_INTERRUPT_SHARED, handler_wrapper, aw);
        if (sc != RTEMS_SUCCESSFUL)
                return (-EINVAL);

        return (0);
}

#include <linux/bitrev.h>

const uint8_t bitrev_nibbles[16] = {
        0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, 11, 7, 15
};

#include <linux/platform_device.h>

struct resource *
platform_get_resource(struct resource *res, struct platform_device *pdev,
    unsigned int type, unsigned int num)
{
        struct device_node *dn;
        int ret;

        dn = pdev->dev.of_node;

        switch (type) {
        case IORESOURCE_MEM:
                ret = of_address_to_resource(dn, num, res);
                if (ret == 0)
                        return res;
        case IORESOURCE_IRQ:
                ret = of_irq_to_resource(dn, num, res);
                if (ret >= 0)
                        return res;
        default:
                break;
        }

        return (NULL);
}

int platform_get_irq(struct platform_device *pdev, unsigned int num)
{
        struct resource res_storage;
        struct resource *res;

        res = platform_get_resource(&res_storage, pdev, IORESOURCE_IRQ, num);
        return (res != NULL ? res->start : -ENXIO);
}