1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright 2004-2006,2010 Freescale Semiconductor, Inc. All Rights Reserved.
4 * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
5 * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
6 *                       <armlinux@phytec.de>
7 */
8
9#include <common.h>
10#include <linux/errno.h>
11#include <asm/io.h>
12#include <asm/arch/clock.h>
13#include <asm/arch/iomux.h>
14#include <asm/arch/imx-regs.h>
15
16#if	defined(CONFIG_MX23)
17#define	DRIVE_OFFSET	0x200
18#define	PULL_OFFSET	0x400
19#elif	defined(CONFIG_MX28)
20#define	DRIVE_OFFSET	0x300
21#define	PULL_OFFSET	0x600
22#else
23#error "Please select CONFIG_MX23 or CONFIG_MX28"
24#endif
25
26/*
27 * configures a single pad in the iomuxer
28 */
29int mxs_iomux_setup_pad(iomux_cfg_t pad)
30{
31	u32 reg, ofs, bp, bm;
32	void *iomux_base = (void *)MXS_PINCTRL_BASE;
33	struct mxs_register_32 *mxs_reg;
34
35	/* muxsel */
36	ofs = 0x100;
37	ofs += PAD_BANK(pad) * 0x20 + PAD_PIN(pad) / 16 * 0x10;
38	bp = PAD_PIN(pad) % 16 * 2;
39	bm = 0x3 << bp;
40	reg = readl(iomux_base + ofs);
41	reg &= ~bm;
42	reg |= PAD_MUXSEL(pad) << bp;
43	writel(reg, iomux_base + ofs);
44
45	/* drive */
46	ofs = DRIVE_OFFSET;
47	ofs += PAD_BANK(pad) * 0x40 + PAD_PIN(pad) / 8 * 0x10;
48	/* mA */
49	if (PAD_MA_VALID(pad)) {
50		bp = PAD_PIN(pad) % 8 * 4;
51		bm = 0x3 << bp;
52		reg = readl(iomux_base + ofs);
53		reg &= ~bm;
54		reg |= PAD_MA(pad) << bp;
55		writel(reg, iomux_base + ofs);
56	}
57	/* vol */
58	if (PAD_VOL_VALID(pad)) {
59		bp = PAD_PIN(pad) % 8 * 4 + 2;
60		mxs_reg = (struct mxs_register_32 *)(iomux_base + ofs);
61		if (PAD_VOL(pad))
62			writel(1 << bp, &mxs_reg->reg_set);
63		else
64			writel(1 << bp, &mxs_reg->reg_clr);
65	}
66
67	/* pull */
68	if (PAD_PULL_VALID(pad)) {
69		ofs = PULL_OFFSET;
70		ofs += PAD_BANK(pad) * 0x10;
71		bp = PAD_PIN(pad);
72		mxs_reg = (struct mxs_register_32 *)(iomux_base + ofs);
73		if (PAD_PULL(pad))
74			writel(1 << bp, &mxs_reg->reg_set);
75		else
76			writel(1 << bp, &mxs_reg->reg_clr);
77	}
78
79	return 0;
80}
81
82int mxs_iomux_setup_multiple_pads(const iomux_cfg_t *pad_list, unsigned count)
83{
84	const iomux_cfg_t *p = pad_list;
85	int i;
86	int ret;
87
88	for (i = 0; i < count; i++) {
89		ret = mxs_iomux_setup_pad(*p);
90		if (ret)
91			return ret;
92		p++;
93	}
94
95	return 0;
96}
97