mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-01 00:49:43 +00:00
d91a672b6d
Taken from Linux kernel with minor modifications:
commit bf985969e27b507f734435a99df8bf745a3dbb2b
Author: Shawn Guo <shawn.guo@freescale.com>
Date: Mon Dec 20 22:57:43 2010 +0800
ARM: mxs: Add iomux support
Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Detlev Zundel <dzu@denx.de>
109 lines
2.8 KiB
C
109 lines
2.8 KiB
C
/*
|
|
* Copyright 2004-2006,2010 Freescale Semiconductor, Inc. All Rights Reserved.
|
|
* Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
|
|
* Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
|
|
* <armlinux@phytec.de>
|
|
*
|
|
* 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/errno.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/clock.h>
|
|
#include <asm/arch/iomux.h>
|
|
#include <asm/arch/imx-regs.h>
|
|
|
|
#if defined(CONFIG_MX23)
|
|
#define DRIVE_OFFSET 0x200
|
|
#define PULL_OFFSET 0x400
|
|
#elif defined(CONFIG_MX28)
|
|
#define DRIVE_OFFSET 0x300
|
|
#define PULL_OFFSET 0x600
|
|
#else
|
|
#error "Please select CONFIG_MX23 or CONFIG_MX28"
|
|
#endif
|
|
|
|
/*
|
|
* configures a single pad in the iomuxer
|
|
*/
|
|
int mxs_iomux_setup_pad(iomux_cfg_t pad)
|
|
{
|
|
u32 reg, ofs, bp, bm;
|
|
void *iomux_base = (void *)MXS_PINCTRL_BASE;
|
|
struct mx28_register *mxs_reg;
|
|
|
|
/* muxsel */
|
|
ofs = 0x100;
|
|
ofs += PAD_BANK(pad) * 0x20 + PAD_PIN(pad) / 16 * 0x10;
|
|
bp = PAD_PIN(pad) % 16 * 2;
|
|
bm = 0x3 << bp;
|
|
reg = readl(iomux_base + ofs);
|
|
reg &= ~bm;
|
|
reg |= PAD_MUXSEL(pad) << bp;
|
|
writel(reg, iomux_base + ofs);
|
|
|
|
/* drive */
|
|
ofs = DRIVE_OFFSET;
|
|
ofs += PAD_BANK(pad) * 0x40 + PAD_PIN(pad) / 8 * 0x10;
|
|
/* mA */
|
|
if (PAD_MA_VALID(pad)) {
|
|
bp = PAD_PIN(pad) % 8 * 4;
|
|
bm = 0x3 << bp;
|
|
reg = readl(iomux_base + ofs);
|
|
reg &= ~bm;
|
|
reg |= PAD_MA(pad) << bp;
|
|
writel(reg, iomux_base + ofs);
|
|
}
|
|
/* vol */
|
|
if (PAD_VOL_VALID(pad)) {
|
|
bp = PAD_PIN(pad) % 8 * 4 + 2;
|
|
mxs_reg = (struct mx28_register *)(iomux_base + ofs);
|
|
if (PAD_VOL(pad))
|
|
writel(1 << bp, &mxs_reg->reg_set);
|
|
else
|
|
writel(1 << bp, &mxs_reg->reg_clr);
|
|
}
|
|
|
|
/* pull */
|
|
if (PAD_PULL_VALID(pad)) {
|
|
ofs = PULL_OFFSET;
|
|
ofs += PAD_BANK(pad) * 0x10;
|
|
bp = PAD_PIN(pad);
|
|
mxs_reg = (struct mx28_register *)(iomux_base + ofs);
|
|
if (PAD_PULL(pad))
|
|
writel(1 << bp, &mxs_reg->reg_set);
|
|
else
|
|
writel(1 << bp, &mxs_reg->reg_clr);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int mxs_iomux_setup_multiple_pads(const iomux_cfg_t *pad_list, unsigned count)
|
|
{
|
|
const iomux_cfg_t *p = pad_list;
|
|
int i;
|
|
int ret;
|
|
|
|
for (i = 0; i < count; i++) {
|
|
ret = mxs_iomux_setup_pad(*p);
|
|
if (ret)
|
|
return ret;
|
|
p++;
|
|
}
|
|
|
|
return 0;
|
|
}
|