2 * Based on the iomux-v3.c from Linux kernel:
3 * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
4 * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
7 * Copyright (C) 2004-2011 Freescale Semiconductor, Inc.
9 * SPDX-License-Identifier: GPL-2.0+
13 #include <asm/arch/imx-regs.h>
14 #include <asm/imx-common/iomux-v3.h>
15 #include <asm/imx-common/sys_proto.h>
17 static void *base = (void *)IOMUXC_BASE_ADDR;
20 * configures a single pad in the iomuxer
22 void imx_iomux_v3_setup_pad(iomux_v3_cfg_t pad)
24 u32 mux_ctrl_ofs = (pad & MUX_CTRL_OFS_MASK) >> MUX_CTRL_OFS_SHIFT;
25 u32 mux_mode = (pad & MUX_MODE_MASK) >> MUX_MODE_SHIFT;
27 (pad & MUX_SEL_INPUT_OFS_MASK) >> MUX_SEL_INPUT_OFS_SHIFT;
29 (pad & MUX_SEL_INPUT_MASK) >> MUX_SEL_INPUT_SHIFT;
31 (pad & MUX_PAD_CTRL_OFS_MASK) >> MUX_PAD_CTRL_OFS_SHIFT;
32 u32 pad_ctrl = (pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT;
34 #if defined CONFIG_MX6SL
35 /* Check whether LVE bit needs to be set */
36 if (pad_ctrl & PAD_CTL_LVE) {
37 pad_ctrl &= ~PAD_CTL_LVE;
38 pad_ctrl |= PAD_CTL_LVE_BIT;
42 #ifdef CONFIG_IOMUX_LPSR
43 u32 lpsr = (pad & MUX_MODE_LPSR) >> MUX_MODE_SHIFT;
45 if (lpsr == IOMUX_CONFIG_LPSR) {
46 base = (void *)IOMUXC_LPSR_BASE_ADDR;
47 mux_mode &= ~IOMUX_CONFIG_LPSR;
48 /* set daisy chain sel_input */
50 sel_input_ofs += IOMUX_LPSR_SEL_INPUT_OFS;
54 if (is_soc_type(MXC_SOC_MX7) || mux_ctrl_ofs)
55 __raw_writel(mux_mode, base + mux_ctrl_ofs);
58 __raw_writel(sel_input, base + sel_input_ofs);
60 #ifdef CONFIG_IOMUX_SHARE_CONF_REG
61 if (!(pad_ctrl & NO_PAD_CTRL))
62 __raw_writel((mux_mode << PAD_MUX_MODE_SHIFT) | pad_ctrl,
65 if (!(pad_ctrl & NO_PAD_CTRL) && pad_ctrl_ofs)
66 __raw_writel(pad_ctrl, base + pad_ctrl_ofs);
69 #ifdef CONFIG_IOMUX_LPSR
70 if (lpsr == IOMUX_CONFIG_LPSR)
71 base = (void *)IOMUXC_BASE_ADDR;
76 /* configures a list of pads within declared with IOMUX_PADS macro */
77 void imx_iomux_v3_setup_multiple_pads(iomux_v3_cfg_t const *pad_list,
80 iomux_v3_cfg_t const *p = pad_list;
84 #if defined(CONFIG_MX6QDL)
86 if (!is_mx6dq() && !is_mx6dqp())
91 for (i = 0; i < count; i++) {
92 imx_iomux_v3_setup_pad(*p);
97 void imx_iomux_set_gpr_register(int group, int start_bit,
98 int num_bits, int value)
102 reg = readl(base + group * 4);
104 reg &= ~(1<<(start_bit + i));
108 reg |= (value << start_bit);
109 writel(reg, base + group * 4);
112 #ifdef CONFIG_IOMUX_SHARE_CONF_REG
113 void imx_iomux_gpio_set_direction(unsigned int gpio,
114 unsigned int direction)
118 * Only on Vybrid the input/output buffer enable flags
119 * are part of the shared mux/conf register.
121 reg = readl(base + (gpio << 2));
128 writel(reg, base + (gpio << 2));
131 void imx_iomux_gpio_get_function(unsigned int gpio, u32 *gpio_state)
133 *gpio_state = readl(base + (gpio << 2)) &
134 ((0X07 << PAD_MUX_MODE_SHIFT) | PAD_CTL_OBE_IBE_ENABLE);