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/*
* Based on the iomux-v3.c from Linux kernel:
* Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
* Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
* <armlinux@phytec.de>
*
* Copyright (C) 2004-2011 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
#include <asm/imx-common/iomux-v3.h>
#include <asm/imx-common/sys_proto.h>
static void *base = (void *)IOMUXC_BASE_ADDR;
/*
* configures a single pad in the iomuxer
*/
void imx_iomux_v3_setup_pad(iomux_v3_cfg_t pad)
{
u32 mux_ctrl_ofs = (pad & MUX_CTRL_OFS_MASK) >> MUX_CTRL_OFS_SHIFT;
u32 mux_mode = (pad & MUX_MODE_MASK) >> MUX_MODE_SHIFT;
u32 sel_input_ofs =
(pad & MUX_SEL_INPUT_OFS_MASK) >> MUX_SEL_INPUT_OFS_SHIFT;
u32 sel_input =
(pad & MUX_SEL_INPUT_MASK) >> MUX_SEL_INPUT_SHIFT;
u32 pad_ctrl_ofs =
(pad & MUX_PAD_CTRL_OFS_MASK) >> MUX_PAD_CTRL_OFS_SHIFT;
u32 pad_ctrl = (pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT;
#if defined CONFIG_MX6SL
/* Check whether LVE bit needs to be set */
if (pad_ctrl & PAD_CTL_LVE) {
pad_ctrl &= ~PAD_CTL_LVE;
pad_ctrl |= PAD_CTL_LVE_BIT;
}
#endif
#ifdef CONFIG_IOMUX_LPSR
u32 lpsr = (pad & MUX_MODE_LPSR) >> MUX_MODE_SHIFT;
if (lpsr == IOMUX_CONFIG_LPSR) {
base = (void *)IOMUXC_LPSR_BASE_ADDR;
mux_mode &= ~IOMUX_CONFIG_LPSR;
/* set daisy chain sel_input */
if (sel_input_ofs)
sel_input_ofs += IOMUX_LPSR_SEL_INPUT_OFS;
}
#endif
if (is_soc_type(MXC_SOC_MX7) || mux_ctrl_ofs)
__raw_writel(mux_mode, base + mux_ctrl_ofs);
if (sel_input_ofs)
__raw_writel(sel_input, base + sel_input_ofs);
#ifdef CONFIG_IOMUX_SHARE_CONF_REG
if (!(pad_ctrl & NO_PAD_CTRL))
__raw_writel((mux_mode << PAD_MUX_MODE_SHIFT) | pad_ctrl,
base + pad_ctrl_ofs);
#else
if (!(pad_ctrl & NO_PAD_CTRL) && pad_ctrl_ofs)
__raw_writel(pad_ctrl, base + pad_ctrl_ofs);
#endif
#ifdef CONFIG_IOMUX_LPSR
if (lpsr == IOMUX_CONFIG_LPSR)
base = (void *)IOMUXC_BASE_ADDR;
#endif
}
/* configures a list of pads within declared with IOMUX_PADS macro */
void imx_iomux_v3_setup_multiple_pads(iomux_v3_cfg_t const *pad_list,
unsigned count)
{
iomux_v3_cfg_t const *p = pad_list;
int stride;
int i;
#if defined(CONFIG_MX6QDL)
stride = 2;
if (!is_cpu_type(MXC_CPU_MX6Q) && !is_cpu_type(MXC_CPU_MX6D))
p += 1;
#else
stride = 1;
#endif
for (i = 0; i < count; i++) {
imx_iomux_v3_setup_pad(*p);
p += stride;
}
}
void imx_iomux_set_gpr_register(int group, int start_bit,
int num_bits, int value)
{
int i = 0;
u32 reg;
reg = readl(base + group * 4);
while (num_bits) {
reg &= ~(1<<(start_bit + i));
i++;
num_bits--;
}
reg |= (value << start_bit);
writel(reg, base + group * 4);
}
#ifdef CONFIG_IOMUX_SHARE_CONF_REG
void imx_iomux_gpio_set_direction(unsigned int gpio,
unsigned int direction)
{
u32 reg;
/*
* Only on Vybrid the input/output buffer enable flags
* are part of the shared mux/conf register.
*/
reg = readl(base + (gpio << 2));
if (direction)
reg |= 0x2;
else
reg &= ~0x2;
writel(reg, base + (gpio << 2));
}
void imx_iomux_gpio_get_function(unsigned int gpio, u32 *gpio_state)
{
*gpio_state = readl(base + (gpio << 2)) &
((0X07 << PAD_MUX_MODE_SHIFT) | PAD_CTL_OBE_IBE_ENABLE);
}
#endif
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