1 // SPDX-License-Identifier: GPL-2.0+
3 * Based on the iomux-v3.c from Linux kernel:
4 * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
5 * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
8 * Copyright (C) 2004-2011 Freescale Semiconductor, Inc.
12 #include <asm/arch/imx-regs.h>
13 #include <asm/mach-imx/iomux-v3.h>
14 #include <asm/mach-imx/sys_proto.h>
16 static void *base = (void *)IOMUXC_BASE_ADDR;
19 * configures a single pad in the iomuxer
21 void imx_iomux_v3_setup_pad(iomux_v3_cfg_t pad)
23 u32 mux_ctrl_ofs = (pad & MUX_CTRL_OFS_MASK) >> MUX_CTRL_OFS_SHIFT;
24 u32 mux_mode = (pad & MUX_MODE_MASK) >> MUX_MODE_SHIFT;
26 (pad & MUX_SEL_INPUT_OFS_MASK) >> MUX_SEL_INPUT_OFS_SHIFT;
28 (pad & MUX_SEL_INPUT_MASK) >> MUX_SEL_INPUT_SHIFT;
30 (pad & MUX_PAD_CTRL_OFS_MASK) >> MUX_PAD_CTRL_OFS_SHIFT;
31 u32 pad_ctrl = (pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT;
33 #if defined(CONFIG_MX6SL) || defined(CONFIG_MX6SLL)
34 /* Check whether LVE bit needs to be set */
35 if (pad_ctrl & PAD_CTL_LVE) {
36 pad_ctrl &= ~PAD_CTL_LVE;
37 pad_ctrl |= PAD_CTL_LVE_BIT;
41 #ifdef CONFIG_IOMUX_LPSR
42 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;
53 if (is_mx6ull() || is_mx6sll()) {
54 if (lpsr == IOMUX_CONFIG_LPSR) {
55 base = (void *)IOMUXC_SNVS_BASE_ADDR;
56 mux_mode &= ~IOMUX_CONFIG_LPSR;
62 if (is_mx7() || is_mx6ull() || is_mx6sll() || mux_ctrl_ofs)
63 __raw_writel(mux_mode, base + mux_ctrl_ofs);
66 __raw_writel(sel_input, base + sel_input_ofs);
68 #ifdef CONFIG_IOMUX_SHARE_CONF_REG
69 if (!(pad_ctrl & NO_PAD_CTRL))
70 __raw_writel((mux_mode << PAD_MUX_MODE_SHIFT) | pad_ctrl,
73 if (!(pad_ctrl & NO_PAD_CTRL) && pad_ctrl_ofs)
74 __raw_writel(pad_ctrl, base + pad_ctrl_ofs);
75 #if defined(CONFIG_MX6SLL)
76 else if ((pad_ctrl & NO_PAD_CTRL) && pad_ctrl_ofs)
77 clrbits_le32(base + pad_ctrl_ofs, PAD_CTL_IPD_BIT);
81 #ifdef CONFIG_IOMUX_LPSR
82 if (lpsr == IOMUX_CONFIG_LPSR)
83 base = (void *)IOMUXC_BASE_ADDR;
88 /* configures a list of pads within declared with IOMUX_PADS macro */
89 void imx_iomux_v3_setup_multiple_pads(iomux_v3_cfg_t const *pad_list,
92 iomux_v3_cfg_t const *p = pad_list;
96 #if defined(CONFIG_MX6QDL)
98 if (!is_mx6dq() && !is_mx6dqp())
103 for (i = 0; i < count; i++) {
104 imx_iomux_v3_setup_pad(*p);
109 void imx_iomux_set_gpr_register(int group, int start_bit,
110 int num_bits, int value)
114 reg = readl(base + group * 4);
116 reg &= ~(1<<(start_bit + i));
120 reg |= (value << start_bit);
121 writel(reg, base + group * 4);
124 #ifdef CONFIG_IOMUX_SHARE_CONF_REG
125 void imx_iomux_gpio_set_direction(unsigned int gpio,
126 unsigned int direction)
130 * Only on Vybrid the input/output buffer enable flags
131 * are part of the shared mux/conf register.
133 reg = readl(base + (gpio << 2));
140 writel(reg, base + (gpio << 2));
143 void imx_iomux_gpio_get_function(unsigned int gpio, u32 *gpio_state)
145 *gpio_state = readl(base + (gpio << 2)) &
146 ((0X07 << PAD_MUX_MODE_SHIFT) | PAD_CTL_OBE_IBE_ENABLE);