ARM: highbank: remove DRAM bank setup
[karo-tx-uboot.git] / board / highbank / highbank.c
1 /*
2  * Copyright 2010-2011 Calxeda, Inc.
3  *
4  * SPDX-License-Identifier:     GPL-2.0+
5  */
6
7 #include <common.h>
8 #include <ahci.h>
9 #include <netdev.h>
10 #include <scsi.h>
11
12 #include <linux/sizes.h>
13 #include <asm/io.h>
14
15 #define HB_AHCI_BASE                    0xffe08000
16
17 #define HB_SCU_A9_PWR_STATUS            0xfff10008
18 #define HB_SREG_A9_PWR_REQ              0xfff3cf00
19 #define HB_SREG_A9_BOOT_SRC_STAT        0xfff3cf04
20 #define HB_SREG_A9_PWRDOM_STAT          0xfff3cf20
21 #define HB_SREG_A15_PWR_CTRL            0xfff3c200
22
23 #define HB_PWR_SUSPEND                  0
24 #define HB_PWR_SOFT_RESET               1
25 #define HB_PWR_HARD_RESET               2
26 #define HB_PWR_SHUTDOWN                 3
27
28 #define PWRDOM_STAT_SATA                0x80000000
29 #define PWRDOM_STAT_PCI                 0x40000000
30 #define PWRDOM_STAT_EMMC                0x20000000
31
32 #define HB_SCU_A9_PWR_NORMAL            0
33 #define HB_SCU_A9_PWR_DORMANT           2
34 #define HB_SCU_A9_PWR_OFF               3
35
36 DECLARE_GLOBAL_DATA_PTR;
37
38 void cphy_disable_overrides(void);
39
40 /*
41  * Miscellaneous platform dependent initialisations
42  */
43 int board_init(void)
44 {
45         icache_enable();
46
47         return 0;
48 }
49
50 /* We know all the init functions have been run now */
51 int board_eth_init(bd_t *bis)
52 {
53         int rc = 0;
54
55 #ifdef CONFIG_CALXEDA_XGMAC
56         rc += calxedaxgmac_initialize(0, 0xfff50000);
57         rc += calxedaxgmac_initialize(1, 0xfff51000);
58 #endif
59         return rc;
60 }
61
62 #ifdef CONFIG_SCSI_AHCI_PLAT
63 void scsi_init(void)
64 {
65         u32 reg = readl(HB_SREG_A9_PWRDOM_STAT);
66
67         cphy_disable_overrides();
68         if (reg & PWRDOM_STAT_SATA) {
69                 ahci_init((void __iomem *)HB_AHCI_BASE);
70                 scsi_scan(1);
71         }
72 }
73 #endif
74
75 #ifdef CONFIG_MISC_INIT_R
76 int misc_init_r(void)
77 {
78         char envbuffer[16];
79         u32 boot_choice;
80
81         boot_choice = readl(HB_SREG_A9_BOOT_SRC_STAT) & 0xff;
82         sprintf(envbuffer, "bootcmd%d", boot_choice);
83         if (getenv(envbuffer)) {
84                 sprintf(envbuffer, "run bootcmd%d", boot_choice);
85                 setenv("bootcmd", envbuffer);
86         } else
87                 setenv("bootcmd", "");
88
89         return 0;
90 }
91 #endif
92
93 int dram_init(void)
94 {
95         gd->ram_size = SZ_512M;
96         return 0;
97 }
98
99 #if defined(CONFIG_OF_BOARD_SETUP)
100 int ft_board_setup(void *fdt, bd_t *bd)
101 {
102         static const char disabled[] = "disabled";
103         u32 reg = readl(HB_SREG_A9_PWRDOM_STAT);
104
105         if (!(reg & PWRDOM_STAT_SATA))
106                 do_fixup_by_compat(fdt, "calxeda,hb-ahci", "status",
107                         disabled, sizeof(disabled), 1);
108
109         if (!(reg & PWRDOM_STAT_EMMC))
110                 do_fixup_by_compat(fdt, "calxeda,hb-sdhci", "status",
111                         disabled, sizeof(disabled), 1);
112
113         return 0;
114 }
115 #endif
116
117 static int is_highbank(void)
118 {
119         uint32_t midr;
120
121         asm volatile ("mrc p15, 0, %0, c0, c0, 0\n" : "=r"(midr));
122
123         return (midr & 0xfff0) == 0xc090;
124 }
125
126 void reset_cpu(ulong addr)
127 {
128         writel(HB_PWR_HARD_RESET, HB_SREG_A9_PWR_REQ);
129         if (is_highbank())
130                 writeb(HB_SCU_A9_PWR_OFF, HB_SCU_A9_PWR_STATUS);
131         else
132                 writel(0x1, HB_SREG_A15_PWR_CTRL);
133
134         wfi();
135 }
136
137 /*
138  * turn off the override before transferring control to Linux, since Linux
139  * may not support spread spectrum.
140  */
141 void arch_preboot_os(void)
142 {
143         cphy_disable_overrides();
144 }