arch/arm/mach-socfpga/system_manager.c

   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
  12 DECLARE_GLOBAL_DATA_PTR;
  13
  14 static 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  */
  22 static 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  */
  57 void sysmgr_pinmux_init(void)
  58 {
  59         uint32_t regs = (uint32_t)&sysmgr_regs->emacio[0];
  60         int i;
  61
  62         for (i = 0; i < ARRAY_SIZE(sys_mgr_init_table); i++) {
  63                 writel(sys_mgr_init_table[i], regs);
  64                 regs += sizeof(regs);
  65         }
  66
  67         populate_sysmgr_fpgaintf_module();
  68 }
  69
  70 /*
  71  * This bit allows the bootrom to configure the IOs after a warm reset.
  72  */
  73 void sysmgr_config_warmrstcfgio(int enable)
  74 {
  75         if (enable)
  76                 setbits_le32(&sysmgr_regs->romcodegrp_ctrl,
  77                              SYSMGR_ROMCODEGRP_CTRL_WARMRSTCFGIO);
  78         else
  79                 clrbits_le32(&sysmgr_regs->romcodegrp_ctrl,
  80                              SYSMGR_ROMCODEGRP_CTRL_WARMRSTCFGIO);
  81 }