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/*
* (C) Copyright 2010
* Marvell Semiconductor <www.marvell.com>
* Written-by: Prafulla Wadaskar <prafulla@marvell.com>,
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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.
*
* 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 Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include <common.h>
#include <asm/io.h>
#include <mvmfp.h>
#include <asm/arch/mfp.h>
/*
* mfp_config
*
* On most of Marvell SoCs (ex. ARMADA100) there is Multi-Funtion-Pin
* configuration registers to configure each GPIO/Function pin on the
* SoC.
*
* This function reads the array of values for
* MFPR_X registers and programms them into respective
* Multi-Function Pin registers.
* It supports - Alternate Function Selection programming.
*
* Whereas,
* The Configureation value is constructed using MFP()
* array consists of 32bit values as defined in MFP(xx,xx..) macro
*/
void mfp_config(u32 *mfp_cfgs)
{
u32 *p_mfpr = NULL;
u32 cfg_val, val;
do {
cfg_val = *mfp_cfgs++;
/* exit if End of configuration table detected */
if (cfg_val == MFP_EOC)
break;
p_mfpr = (u32 *)(MV_MFPR_BASE
+ MFP_REG_GET_OFFSET(cfg_val));
/* Write a mfg register as per configuration */
val = 0;
if (cfg_val & MFP_AF_FLAG)
/* Abstract and program Afternate-Func Selection */
val |= cfg_val & MFP_AF_MASK;
if (cfg_val & MFP_EDGE_FLAG)
/* Abstract and program Edge configuration */
val |= cfg_val & MFP_LPM_EDGE_MASK;
if (cfg_val & MFP_DRIVE_FLAG)
/* Abstract and program Drive configuration */
val |= cfg_val & MFP_DRIVE_MASK;
if (cfg_val & MFP_PULL_FLAG)
/* Abstract and program Pullup/down configuration */
val |= cfg_val & MFP_PULL_MASK;
writel(val, p_mfpr);
} while (1);
/*
* perform a read-back of any MFPR register to make sure the
* previous writings are finished
*/
readl(p_mfpr);
}
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