/*
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* Copyright 2004-2006,2010 Freescale Semiconductor, Inc. All Rights Reserved.
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* Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
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* Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
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* <armlinux@phytec.de>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <linux/errno.h>
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#include <asm/io.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/iomux.h>
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#include <asm/arch/imx-regs.h>
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#if defined(CONFIG_MX23)
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#define DRIVE_OFFSET 0x200
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#define PULL_OFFSET 0x400
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#elif defined(CONFIG_MX28)
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#define DRIVE_OFFSET 0x300
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#define PULL_OFFSET 0x600
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#else
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#error "Please select CONFIG_MX23 or CONFIG_MX28"
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#endif
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/*
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* configures a single pad in the iomuxer
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*/
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int mxs_iomux_setup_pad(iomux_cfg_t pad)
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{
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u32 reg, ofs, bp, bm;
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void *iomux_base = (void *)MXS_PINCTRL_BASE;
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struct mxs_register_32 *mxs_reg;
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/* muxsel */
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ofs = 0x100;
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ofs += PAD_BANK(pad) * 0x20 + PAD_PIN(pad) / 16 * 0x10;
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bp = PAD_PIN(pad) % 16 * 2;
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bm = 0x3 << bp;
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reg = readl(iomux_base + ofs);
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reg &= ~bm;
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reg |= PAD_MUXSEL(pad) << bp;
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writel(reg, iomux_base + ofs);
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/* drive */
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ofs = DRIVE_OFFSET;
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ofs += PAD_BANK(pad) * 0x40 + PAD_PIN(pad) / 8 * 0x10;
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/* mA */
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if (PAD_MA_VALID(pad)) {
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bp = PAD_PIN(pad) % 8 * 4;
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bm = 0x3 << bp;
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reg = readl(iomux_base + ofs);
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reg &= ~bm;
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reg |= PAD_MA(pad) << bp;
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writel(reg, iomux_base + ofs);
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}
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/* vol */
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if (PAD_VOL_VALID(pad)) {
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bp = PAD_PIN(pad) % 8 * 4 + 2;
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mxs_reg = (struct mxs_register_32 *)(iomux_base + ofs);
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if (PAD_VOL(pad))
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writel(1 << bp, &mxs_reg->reg_set);
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else
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writel(1 << bp, &mxs_reg->reg_clr);
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}
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/* pull */
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if (PAD_PULL_VALID(pad)) {
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ofs = PULL_OFFSET;
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ofs += PAD_BANK(pad) * 0x10;
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bp = PAD_PIN(pad);
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mxs_reg = (struct mxs_register_32 *)(iomux_base + ofs);
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if (PAD_PULL(pad))
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writel(1 << bp, &mxs_reg->reg_set);
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else
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writel(1 << bp, &mxs_reg->reg_clr);
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}
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return 0;
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}
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int mxs_iomux_setup_multiple_pads(const iomux_cfg_t *pad_list, unsigned count)
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{
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const iomux_cfg_t *p = pad_list;
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int i;
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int ret;
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for (i = 0; i < count; i++) {
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ret = mxs_iomux_setup_pad(*p);
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if (ret)
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return ret;
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p++;
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}
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return 0;
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}
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