arch/arm/mach-at91/atmel_sfr.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2015 Atmel Corporation
   4  *                    Wenyou Yang <wenyou.yang@atmel.com>
   5  */
   6
   7 #include <common.h>
   8 #include <asm/hardware.h>
   9 #include <asm/io.h>
  10 #include <asm/arch/at91_sfr.h>
  11
  12 #if defined(CONFIG_SAMA5D2) || defined(CONFIG_SAMA5D4)
  13 void redirect_int_from_saic_to_aic(void)
  14 {
  15         struct atmel_sfr *sfr = (struct atmel_sfr *)ATMEL_BASE_SFR;
  16         u32 key32;
  17
  18         if (!(readl(&sfr->aicredir) & ATMEL_SFR_AICREDIR_NSAIC)) {
  19                 key32 = readl(&sfr->sn1) ^ ATMEL_SFR_AICREDIR_KEY;
  20                 writel((key32 | ATMEL_SFR_AICREDIR_NSAIC), &sfr->aicredir);
  21         }
  22 }
  23
  24 void configure_2nd_sram_as_l2_cache(void)
  25 {
  26         struct atmel_sfr *sfr = (struct atmel_sfr *)ATMEL_BASE_SFR;
  27
  28         writel(1, &sfr->l2cc_hramc);
  29 }
  30 #endif
  31
  32 void configure_ddrcfg_input_buffers(bool open)
  33 {
  34         struct atmel_sfr *sfr = (struct atmel_sfr *)ATMEL_BASE_SFR;
  35
  36         if (open)
  37                 writel(ATMEL_SFR_DDRCFG_FDQIEN | ATMEL_SFR_DDRCFG_FDQSIEN,
  38                        &sfr->ddrcfg);
  39         else
  40                 writel(0, &sfr->ddrcfg);
  41 }