board/ms7750se/lowlevel_init.S

   1 /*
   2  modified from SH-IPL+g
   3  Renesaso SuperH / Solution Enginge MS775xSE01 BSC setting.
   4
   5  Support CPU : SH7750/SH7750S/SH7750R/SH7751/SH7751R
   6
   7  Coyright (c) 2007 Nobuhiro Iwamatsu <iwmatsu@nigauri.org>
   8
   9  * SPDX-License-Identifier:     GPL-2.0+
  10 */
  11
  12 #include <config.h>
  13
  14 #include <asm/processor.h>
  15 #include <asm/macro.h>
  16
  17 #ifdef CONFIG_CPU_SH7751
  18 #define BCR2_D_VALUE    0x2FFC          /* Area 1-6 width: 32/32/32/32/32/16 */
  19 #define WCR1_D_VALUE    0x02770771      /* DMA:0 A6:2 A3:0 A0:1 Others:15 */
  20 #ifdef CONFIG_MARUBUN_PCCARD
  21 #define WCR2_D_VALUE    0xFFFE4FE7      /* A6:15 A6B:7 A5:15 A5B:7 A4:15
  22                                            A3:2  A2:15 A1:15 A0:6  A0B:7  */
  23 #else /* CONFIG_MARUBUN_PCCARD */
  24 #define WCR2_D_VALUE    0x7FFE4FE7      /* A6:3  A6B:7 A5:15 A5B:7 A4:15
  25                                            A3:2  A2:15 A1:15 A0:6  A0B:7  */
  26 #endif /* CONFIG_MARUBUN_PCCARD */
  27 #define WCR3_D_VALUE    0x01777771      /* A6: 0-1 A5: 1-3 A4: 1-3 A3: 1-3
  28                                            A2: 1-3 A1: 1-3 A0: 0-1 */
  29 #define RTCOR_D_VALUE   0xA50D          /* Write code A5, data 0D (~15us?) */
  30 #define SDMR3_ADDRESS   0xFF940088      /* SDMR3 address on 32-bit bus */
  31 #define MCR_D1_VALUE    0x100901B4      /* SDRAM 32-bit, CAS/RAS Refresh, .. */
  32 #define MCR_D2_VALUE    0x500901B4      /* Same w/MRSET now 1 (mode reg cmd) */
  33 #else /* CONFIG_CPU_SH7751 */
  34 #define BCR2_D_VALUE    0x2E3C          /* Area 1-6 width: 32/32/64/16/32/16 */
  35 #define WCR1_D_VALUE    0x02720777      /* DMA:0 A6:2 A4:2 A3:0 Others:15 */
  36 #define WCR2_D_VALUE    0xFFFE4FFF      /* A6:15 A6B:7 A5:15 A5B:7 A4:15
  37                                            A3:2  A2:15 A1:15 A0:15 A0B:7  */
  38 #define WCR3_D_VALUE    0x01717771      /* A6: 0-1 A5: 1-3 A4: 0-1 A3: 1-3
  39                                            A2: 1-3 A1: 1-3 A0: 0-1 */
  40 #define RTCOR_D_VALUE   0xA510          /* Write code A5, data 10 (~15us?) */
  41 #define SDMR3_ADDRESS   0xFF940110      /* SDMR3 address on 64-bit bus */
  42 #define MCR_D1_VALUE    0x8801001C      /* SDRAM 64-bit, CAS/RAS Refresh, .. */
  43 #define MCR_D2_VALUE    0xC801001C      /* Same w/MRSET now 1 (mode reg cmd) */
  44 #endif /* CONFIG_CPU_SH7751 */
  45
  46         .global lowlevel_init
  47         .text
  48         .align  2
  49
  50 lowlevel_init:
  51
  52         write32 CCR_A, CCR_D_DISABLE
  53
  54 init_bsc:
  55         write16 FRQCR_A, FRQCR_D
  56
  57         write32 BCR1_A, BCR1_D
  58
  59         write16 BCR2_A, BCR2_D
  60
  61         write32 WCR1_A, WCR1_D
  62
  63         write32 WCR2_A, WCR2_D
  64
  65         write32 WCR3_A, WCR3_D
  66
  67         write32 MCR_A, MCR_D1
  68
  69         /* Set SDRAM mode */
  70         write8  SDMR3_A, SDMR3_D
  71
  72         ! Do you need PCMCIA setting?
  73         ! If so, please add the lines here...
  74
  75         write16 RTCNT_A, RTCNT_D
  76
  77         write16 RTCOR_A, RTCOR_D
  78
  79         write16 RTCSR_A, RTCSR_D
  80
  81         write16 RFCR_A, RFCR_D
  82
  83         /* Wait DRAM refresh 30 times */
  84         mov     #30, r3
  85 1:
  86         mov.w   @r1, r0
  87         extu.w  r0, r2
  88         cmp/hi  r3, r2
  89         bf      1b
  90
  91         write32 MCR_A, MCR_D2
  92
  93         /* Set SDRAM mode */
  94         write8  SDMR3_A, SDMR3_D
  95
  96         rts
  97         nop
  98
  99         .align  2
 100
 101 CCR_A:           .long  CCR
 102 CCR_D_DISABLE:  .long   0x0808
 103 FRQCR_A:        .long   FRQCR
 104 FRQCR_D:
 105 #ifdef CONFIG_CPU_TYPE_R
 106                 .word   0x0e1a  /* 12:3:3 */
 107 #else   /* CONFIG_CPU_TYPE_R */
 108 #ifdef CONFIG_GOOD_SESH4
 109                 .word   0x00e13 /* 6:2:1 */
 110 #else
 111                 .word   0x00e23 /* 6:1:1 */
 112 #endif
 113 .align 2
 114 #endif  /* CONFIG_CPU_TYPE_R */
 115
 116 BCR1_A:         .long   BCR1
 117 BCR1_D:         .long   0x00000008      /* Area 3 SDRAM */
 118 BCR2_A:         .long   BCR2
 119 BCR2_D:         .long   BCR2_D_VALUE    /* Bus width settings */
 120 WCR1_A:         .long   WCR1
 121 WCR1_D:         .long   WCR1_D_VALUE    /* Inter-area or turnaround wait states */
 122 WCR2_A:         .long   WCR2
 123 WCR2_D:         .long   WCR2_D_VALUE    /* Per-area access and burst wait states */
 124 WCR3_A:         .long   WCR3
 125 WCR3_D:         .long   WCR3_D_VALUE    /* Address setup and data hold cycles */
 126 RTCSR_A:        .long   RTCSR
 127 RTCSR_D:        .word   0xA518          /* RTCSR Write Code A5h Data 18h */
 128 .align 2
 129 RTCNT_A:        .long   RTCNT
 130 RTCNT_D:        .word   0xA500          /* RTCNT Write Code A5h Data 00h */
 131 .align 2
 132 RTCOR_A:        .long   RTCOR
 133 RTCOR_D:        .word   RTCOR_D_VALUE   /* Set refresh time (about 15us) */
 134 .align 2
 135 SDMR3_A:        .long   SDMR3_ADDRESS
 136 SDMR3_D:        .long   0x00
 137 MCR_A:          .long   MCR
 138 MCR_D1:         .long   MCR_D1_VALUE
 139 MCR_D2:         .long   MCR_D2_VALUE
 140 RFCR_A:         .long   RFCR
 141 RFCR_D:         .word   0xA400          /* RFCR Write Code A4h Data 00h */
 142 .align 2