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;
}