LXR uboot/arch/arm/mach-imx/mx7ulp/iomux.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (C) 2016 Freescale Semiconductor, Inc.
   4 */
   5#include <common.h>
   6#include <log.h>
   7#include <asm/io.h>
   8#include <asm/arch/imx-regs.h>
   9#include <asm/arch/iomux.h>
  10
  11static void *base = (void *)IOMUXC_BASE_ADDR;
  12
  13/*
  14 * iomuxc0 base address. In imx7ulp-pins.h,
  15 * the offsets of pins in iomuxc0 are from 0xD000,
  16 * so we set the base address to (0x4103D000 - 0xD000 = 0x41030000)
  17 */
  18static void *base_mports = (void *)(AIPS0_BASE + 0x30000);
  19
  20/*
  21 * configures a single pad in the iomuxer
  22 */
  23void mx7ulp_iomux_setup_pad(iomux_cfg_t pad)
  24{
  25        u32 mux_ctrl_ofs = (pad & MUX_CTRL_OFS_MASK) >> MUX_CTRL_OFS_SHIFT;
  26        u32 mux_mode = (pad & MUX_MODE_MASK) >> MUX_MODE_SHIFT;
  27        u32 sel_input_ofs =
  28                (pad & MUX_SEL_INPUT_OFS_MASK) >> MUX_SEL_INPUT_OFS_SHIFT;
  29        u32 sel_input =
  30                (pad & MUX_SEL_INPUT_MASK) >> MUX_SEL_INPUT_SHIFT;
  31        u32 pad_ctrl_ofs = mux_ctrl_ofs;
  32        u32 pad_ctrl = (pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT;
  33
  34        debug("[PAD CFG] = 0x%16llX \r\n\tmux_ctl = 0x%X(0x%X) sel_input = 0x%X(0x%X) pad_ctrl = 0x%X(0x%X)\r\n",
  35              pad, mux_ctrl_ofs, mux_mode, sel_input_ofs, sel_input,
  36              pad_ctrl_ofs, pad_ctrl);
  37
  38        if (mux_mode & IOMUX_CONFIG_MPORTS) {
  39                mux_mode &= ~IOMUX_CONFIG_MPORTS;
  40                base = base_mports;
  41        } else {
  42                base = (void *)IOMUXC_BASE_ADDR;
  43        }
  44
  45        __raw_writel(((mux_mode << IOMUXC_PCR_MUX_ALT_SHIFT) &
  46                     IOMUXC_PCR_MUX_ALT_MASK), base + mux_ctrl_ofs);
  47
  48        if (sel_input_ofs)
  49                __raw_writel((sel_input << IOMUXC_PSMI_IMUX_ALT_SHIFT),
  50                        base + sel_input_ofs);
  51
  52        if (!(pad_ctrl & NO_PAD_CTRL))
  53                __raw_writel(((mux_mode << IOMUXC_PCR_MUX_ALT_SHIFT) &
  54                             IOMUXC_PCR_MUX_ALT_MASK) |
  55                             (pad_ctrl & (~IOMUXC_PCR_MUX_ALT_MASK)),
  56                             base + pad_ctrl_ofs);
  57}
  58
  59/* configures a list of pads within declared with IOMUX_PADS macro */
  60void mx7ulp_iomux_setup_multiple_pads(iomux_cfg_t const *pad_list,
  61                                      unsigned count)
  62{
  63        iomux_cfg_t const *p = pad_list;
  64        int i;
  65
  66        for (i = 0; i < count; i++) {
  67                mx7ulp_iomux_setup_pad(*p);
  68                p++;
  69        }
  70}
  71