io.c

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/*
 * This file is part of wl18xx
 *
 * Copyright (C) 2011 Texas Instruments
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include "../wlcore/wlcore.h"
#include "../wlcore/io.h"

#include "io.h"

int wl18xx_top_reg_write(struct wl1271 *wl, int addr, u16 val)
{
    u32 tmp;
    int ret;

    if (WARN_ON(addr % 2))
        return -EINVAL;

    if ((addr % 4) == 0) {
        ret = wlcore_read32(wl, addr, &tmp);
        if (ret < 0)
            goto out;

        tmp = (tmp & 0xffff0000) | val;
        ret = wlcore_write32(wl, addr, tmp);
    } else {
        ret = wlcore_read32(wl, addr - 2, &tmp);
        if (ret < 0)
            goto out;

        tmp = (tmp & 0xffff) | (val << 16);
        ret = wlcore_write32(wl, addr - 2, tmp);
    }

out:
    return ret;
}

int wl18xx_top_reg_read(struct wl1271 *wl, int addr, u16 *out)
{
    u32 val = 0;
    int ret;

    if (WARN_ON(addr % 2))
        return -EINVAL;

    if ((addr % 4) == 0) {
        /* address is 4-bytes aligned */
        ret = wlcore_read32(wl, addr, &val);
        if (ret >= 0 && out)
            *out = val & 0xffff;
    } else {
        ret = wlcore_read32(wl, addr - 2, &val);
        if (ret >= 0 && out)
            *out = (val & 0xffff0000) >> 16;
    }

    return ret;
}