109 lines
2.8 KiB
C
109 lines
2.8 KiB
C
/*
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* Copyright 2004-2006 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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <common.h>
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#include <init.h>
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#include <io.h>
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#include <mach/iomux-v3.h>
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#include <mach/imx-regs.h>
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static void __iomem *base;
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/*
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* configures a single pad in the iomuxer
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*/
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int mxc_iomux_v3_setup_pad(iomux_v3_cfg_t pad)
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{
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u32 mux_ctrl_ofs = (pad & MUX_CTRL_OFS_MASK) >> MUX_CTRL_OFS_SHIFT;
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u32 mux_mode = (pad & MUX_MODE_MASK) >> MUX_MODE_SHIFT;
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u32 sel_input_ofs = (pad & MUX_SEL_INPUT_OFS_MASK) >> MUX_SEL_INPUT_OFS_SHIFT;
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u32 sel_input = (pad & MUX_SEL_INPUT_MASK) >> MUX_SEL_INPUT_SHIFT;
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u32 pad_ctrl_ofs = (pad & MUX_PAD_CTRL_OFS_MASK) >> MUX_PAD_CTRL_OFS_SHIFT;
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u32 pad_ctrl = (pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT;
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if (!base)
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return -EINVAL;
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debug("%s: mux 0x%08x -> 0x%04x pad: 0x%08x -> 0x%04x sel_inp: 0x%08x -> 0x%04x\n",
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__func__, mux_mode, mux_ctrl_ofs, pad_ctrl, pad_ctrl_ofs, sel_input,
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sel_input_ofs);
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if (mux_ctrl_ofs)
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__raw_writel(mux_mode, base + mux_ctrl_ofs);
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if (sel_input_ofs)
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__raw_writel(sel_input, base + sel_input_ofs);
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if (!(pad_ctrl & NO_PAD_CTRL) && pad_ctrl_ofs)
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__raw_writel(pad_ctrl, base + pad_ctrl_ofs);
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return 0;
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}
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EXPORT_SYMBOL(mxc_iomux_v3_setup_pad);
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int mxc_iomux_v3_setup_multiple_pads(iomux_v3_cfg_t *pad_list, unsigned count)
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{
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iomux_v3_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 = mxc_iomux_v3_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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EXPORT_SYMBOL(mxc_iomux_v3_setup_multiple_pads);
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static int imx_iomux_probe(struct device_d *dev)
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{
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base = dev_request_mem_region(dev, 0);
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return 0;
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}
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static __maybe_unused struct of_device_id imx_iomux_dt_ids[] = {
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{
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.compatible = "fsl,imx35-iomux",
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}, {
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/* sentinel */
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}
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};
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static struct platform_device_id imx_iomux_ids[] = {
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{
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.name = "imx35-iomux",
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}, {
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/* sentinel */
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},
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};
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static struct driver_d imx_iomux_driver = {
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.name = "imx-iomuxv3",
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.probe = imx_iomux_probe,
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.of_compatible = DRV_OF_COMPAT(imx_iomux_dt_ids),
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.id_table = imx_iomux_ids,
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};
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static int imx_iomux_init(void)
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{
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return platform_driver_register(&imx_iomux_driver);
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}
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postcore_initcall(imx_iomux_init);
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