LXR uboot/arch/arm/mach-socfpga/system

   1/*
   2 * Copyright (C) 2013 Altera Corporation <www.altera.com>
   3 *
   4 * SPDX-License-Identifier:     GPL-2.0+
   5 */
   6
   7#include <common.h>
   8#include <asm/io.h>
   9#include <asm/arch/system_manager.h>
  10#include <asm/arch/fpga_manager.h>
  11
  12DECLARE_GLOBAL_DATA_PTR;
  13
  14static struct socfpga_system_manager *sysmgr_regs =
  15        (struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;
  16
  17/*
  18 * Populate the value for SYSMGR.FPGAINTF.MODULE based on pinmux setting.
  19 * The value is not wrote to SYSMGR.FPGAINTF.MODULE but
  20 * CONFIG_SYSMGR_ISWGRP_HANDOFF.
  21 */
  22static void populate_sysmgr_fpgaintf_module(void)
  23{
  24        uint32_t handoff_val = 0;
  25
  26        /* ISWGRP_HANDOFF_FPGAINTF */
  27        writel(0, &sysmgr_regs->iswgrp_handoff[2]);
  28
  29        /* Enable the signal for those HPS peripherals that use FPGA. */
  30        if (readl(&sysmgr_regs->nandusefpga) == SYSMGR_FPGAINTF_USEFPGA)
  31                handoff_val |= SYSMGR_FPGAINTF_NAND;
  32        if (readl(&sysmgr_regs->rgmii1usefpga) == SYSMGR_FPGAINTF_USEFPGA)
  33                handoff_val |= SYSMGR_FPGAINTF_EMAC1;
  34        if (readl(&sysmgr_regs->sdmmcusefpga) == SYSMGR_FPGAINTF_USEFPGA)
  35                handoff_val |= SYSMGR_FPGAINTF_SDMMC;
  36        if (readl(&sysmgr_regs->rgmii0usefpga) == SYSMGR_FPGAINTF_USEFPGA)
  37                handoff_val |= SYSMGR_FPGAINTF_EMAC0;
  38        if (readl(&sysmgr_regs->spim0usefpga) == SYSMGR_FPGAINTF_USEFPGA)
  39                handoff_val |= SYSMGR_FPGAINTF_SPIM0;
  40        if (readl(&sysmgr_regs->spim1usefpga) == SYSMGR_FPGAINTF_USEFPGA)
  41                handoff_val |= SYSMGR_FPGAINTF_SPIM1;
  42
  43        /* populate (not writing) the value for SYSMGR.FPGAINTF.MODULE
  44        based on pinmux setting */
  45        setbits_le32(&sysmgr_regs->iswgrp_handoff[2], handoff_val);
  46
  47        handoff_val = readl(&sysmgr_regs->iswgrp_handoff[2]);
  48        if (fpgamgr_test_fpga_ready()) {
  49                /* Enable the required signals only */
  50                writel(handoff_val, &sysmgr_regs->fpgaintfgrp_module);
  51        }
  52}
  53
  54/*
  55 * Configure all the pin muxes
  56 */
  57void sysmgr_pinmux_init(void)
  58{
  59        uint32_t regs = (uint32_t)&sysmgr_regs->emacio[0];
  60        const u8 *sys_mgr_init_table;
  61        unsigned int len;
  62        int i;
  63
  64        sysmgr_get_pinmux_table(&sys_mgr_init_table, &len);
  65
  66        for (i = 0; i < len; i++) {
  67                writel(sys_mgr_init_table[i], regs);
  68                regs += sizeof(regs);
  69        }
  70
  71        populate_sysmgr_fpgaintf_module();
  72}
  73
  74/*
  75 * This bit allows the bootrom to configure the IOs after a warm reset.
  76 */
  77void sysmgr_config_warmrstcfgio(int enable)
  78{
  79        if (enable)
  80                setbits_le32(&sysmgr_regs->romcodegrp_ctrl,
  81                             SYSMGR_ROMCODEGRP_CTRL_WARMRSTCFGIO);
  82        else
  83                clrbits_le32(&sysmgr_regs->romcodegrp_ctrl,
  84                             SYSMGR_ROMCODEGRP_CTRL_WARMRSTCFGIO);
  85}
  86