arch/arm/mach-uniphier/ph1-sld3/sbc_init.c

   1 /*
   2  * Copyright (C) 2011-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <linux/io.h>
   9 #include <mach/sbc-regs.h>
  10 #include <mach/sg-regs.h>
  11
  12 void sbc_init(void)
  13 {
  14         /* only address/data multiplex mode is supported */
  15
  16         /*
  17          * Only CS1 is connected to support card.
  18          * BKSZ[1:0] should be set to "01".
  19          */
  20         writel(SBCTRL0_ADMULTIPLX_MEM_VALUE, SBCTRL10);
  21         writel(SBCTRL1_ADMULTIPLX_MEM_VALUE, SBCTRL11);
  22         writel(SBCTRL2_ADMULTIPLX_MEM_VALUE, SBCTRL12);
  23
  24         if (boot_is_swapped()) {
  25                 /*
  26                  * Boot Swap On: boot from external NOR/SRAM
  27                  * 0x42000000-0x43ffffff is a mirror of 0x40000000-0x41ffffff.
  28                  *
  29                  * 0x40000000-0x41efffff, 0x42000000-0x43efffff: memory bank
  30                  * 0x41f00000-0x41ffffff, 0x43f00000-0x43ffffff: peripherals
  31                  */
  32                 writel(0x0000bc01, SBBASE0);
  33         } else {
  34                 /*
  35                  * Boot Swap Off: boot from mask ROM
  36                  * 0x40000000-0x41ffffff: mask ROM
  37                  * 0x42000000-0x43efffff: memory bank (31MB)
  38                  * 0x43f00000-0x43ffffff: peripherals (1MB)
  39                  */
  40                 writel(0x0000be01, SBBASE0); /* dummy */
  41                 writel(0x0200be01, SBBASE1);
  42         }
  43
  44         sg_set_pinsel(99, 1, 4, 4);     /* GPIO26 -> EA24 */
  45 }