af8d6f4f9dc5bb90ca71d5e70fc5ee7c5c2ea9a5
[oweals/u-boot.git] / arch / arm / mach-uniphier / sbc / sbc.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2011-2015 Panasonic Corporation
4  * Copyright (C) 2015-2017 Socionext Inc.
5  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
6  */
7
8 #include <common.h>
9 #include <linux/io.h>
10 #include <asm/global_data.h>
11
12 #include "../init.h"
13 #include "sbc-regs.h"
14
15 #define SBCTRL0_ADMULTIPLX_PERI_VALUE   0x33120000
16 #define SBCTRL1_ADMULTIPLX_PERI_VALUE   0x03005500
17 #define SBCTRL2_ADMULTIPLX_PERI_VALUE   0x14000020
18
19 #define SBCTRL0_ADMULTIPLX_MEM_VALUE    0x33120000
20 #define SBCTRL1_ADMULTIPLX_MEM_VALUE    0x03005500
21 #define SBCTRL2_ADMULTIPLX_MEM_VALUE    0x14000010
22
23 /* slower but LED works */
24 #define SBCTRL0_SAVEPIN_PERI_VALUE      0x55450000
25 #define SBCTRL1_SAVEPIN_PERI_VALUE      0x07168d00
26 #define SBCTRL2_SAVEPIN_PERI_VALUE      0x34000009
27 #define SBCTRL4_SAVEPIN_PERI_VALUE      0x02110110
28
29 /* faster but LED does not work */
30 #define SBCTRL0_SAVEPIN_MEM_VALUE       0x55450000
31 #define SBCTRL1_SAVEPIN_MEM_VALUE       0x06057700
32 /* NOR flash needs more wait counts than SRAM */
33 #define SBCTRL2_SAVEPIN_MEM_VALUE       0x34000009
34 #define SBCTRL4_SAVEPIN_MEM_VALUE       0x02110210
35
36 int uniphier_sbc_is_enabled(void)
37 {
38         DECLARE_GLOBAL_DATA_PTR;
39         const void *fdt = gd->fdt_blob;
40         int offset;
41
42         offset = fdt_node_offset_by_compatible(fdt, 0,
43                                                "socionext,uniphier-system-bus");
44         if (offset < 0)
45                 return 0;
46
47         return fdtdec_get_is_enabled(fdt, offset);
48 }
49
50 static void __uniphier_sbc_init(int savepin)
51 {
52         /*
53          * Only CS1 is connected to support card.
54          * BKSZ[1:0] should be set to "01".
55          */
56         if (savepin) {
57                 writel(SBCTRL0_SAVEPIN_PERI_VALUE, SBCTRL10);
58                 writel(SBCTRL1_SAVEPIN_PERI_VALUE, SBCTRL11);
59                 writel(SBCTRL2_SAVEPIN_PERI_VALUE, SBCTRL12);
60                 writel(SBCTRL4_SAVEPIN_PERI_VALUE, SBCTRL14);
61         } else {
62                 writel(SBCTRL0_ADMULTIPLX_MEM_VALUE, SBCTRL10);
63                 writel(SBCTRL1_ADMULTIPLX_MEM_VALUE, SBCTRL11);
64                 writel(SBCTRL2_ADMULTIPLX_MEM_VALUE, SBCTRL12);
65         }
66
67         if (uniphier_sbc_boot_is_swapped()) {
68                 /*
69                  * Boot Swap On: boot from external NOR/SRAM
70                  * 0x42000000-0x43ffffff is a mirror of 0x40000000-0x41ffffff.
71                  *
72                  * 0x40000000-0x41efffff, 0x42000000-0x43efffff: memory bank
73                  * 0x41f00000-0x41ffffff, 0x43f00000-0x43ffffff: peripherals
74                  */
75                 writel(0x0000bc01, SBBASE0);
76         } else {
77                 /*
78                  * Boot Swap Off: boot from mask ROM
79                  * 0x40000000-0x41ffffff: mask ROM
80                  * 0x42000000-0x43efffff: memory bank (31MB)
81                  * 0x43f00000-0x43ffffff: peripherals (1MB)
82                  */
83                 writel(0x0000be01, SBBASE0); /* dummy */
84                 writel(0x0200be01, SBBASE1);
85         }
86 }
87
88 void uniphier_sbc_init_admulti(void)
89 {
90         __uniphier_sbc_init(0);
91 }
92
93 void uniphier_sbc_init_savepin(void)
94 {
95         __uniphier_sbc_init(1);
96 }