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