1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2018 Cisco Systems, Inc.
4 *
5 * Author: Thomas Fitzsimmons <fitzsim@fitzsim.org>
6 */
7
8 #include <linux/types.h>
9 #include <common.h>
10 #include <asm/io.h>
11 #include <asm/bootm.h>
12 #include <mach/sdhci.h>
13 #include <mach/timer.h>
14 #include <mmc.h>
15 #include <fdtdec.h>
16
17 DECLARE_GLOBAL_DATA_PTR;
18
19 #define BCMSTB_DATA_SECTION __attribute__((section(".data")))
20
21 struct bcmstb_boot_parameters bcmstb_boot_parameters BCMSTB_DATA_SECTION;
22
23 phys_addr_t prior_stage_fdt_address BCMSTB_DATA_SECTION;
24
25 union reg_value_union {
26 const char *data;
27 const phys_addr_t *address;
28 };
29
board_init(void)30 int board_init(void)
31 {
32 return 0;
33 }
34
get_board_rev(void)35 u32 get_board_rev(void)
36 {
37 return 0;
38 }
39
reset_cpu(ulong ignored)40 void reset_cpu(ulong ignored)
41 {
42 }
43
print_cpuinfo(void)44 int print_cpuinfo(void)
45 {
46 return 0;
47 }
48
dram_init(void)49 int dram_init(void)
50 {
51 if (fdtdec_setup_mem_size_base() != 0)
52 return -EINVAL;
53
54 return 0;
55 }
56
dram_init_banksize(void)57 int dram_init_banksize(void)
58 {
59 fdtdec_setup_memory_banksize();
60
61 /*
62 * On this SoC, U-Boot is running as an ELF file. Change the
63 * relocation address to CONFIG_SYS_TEXT_BASE, so that in
64 * setup_reloc, gd->reloc_off works out to 0, effectively
65 * disabling relocation. Otherwise U-Boot hangs in the setup
66 * instructions just before relocate_code in
67 * arch/arm/lib/crt0.S.
68 */
69 gd->relocaddr = CONFIG_SYS_TEXT_BASE;
70
71 return 0;
72 }
73
enable_caches(void)74 void enable_caches(void)
75 {
76 /*
77 * This port assumes that the prior stage bootloader has
78 * enabled I-cache and D-cache already. Implementing this
79 * function silences the warning in the default function.
80 */
81 }
82
bcmstb_sdhci_address(u32 alias_index)83 static const phys_addr_t bcmstb_sdhci_address(u32 alias_index)
84 {
85 int node = 0;
86 int ret = 0;
87 char sdhci[16] = { 0 };
88 const void *fdt = gd->fdt_blob;
89 const char *path = NULL;
90 struct fdt_resource resource = { 0 };
91
92 if (!fdt) {
93 printf("%s: Invalid gd->fdt_blob\n", __func__);
94 return 0;
95 }
96
97 node = fdt_path_offset(fdt, "/aliases");
98 if (node < 0) {
99 printf("%s: Failed to find /aliases node\n", __func__);
100 return 0;
101 }
102
103 sprintf(sdhci, "sdhci%d", alias_index);
104 path = fdt_getprop(fdt, node, sdhci, NULL);
105 if (!path) {
106 printf("%s: Failed to find alias for %s\n", __func__, sdhci);
107 return 0;
108 }
109
110 node = fdt_path_offset(fdt, path);
111 if (node < 0) {
112 printf("%s: Failed to resolve BCMSTB SDHCI alias\n", __func__);
113 return 0;
114 }
115
116 ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
117 "host", &resource);
118 if (ret) {
119 printf("%s: Failed to read BCMSTB SDHCI host resource\n",
120 __func__);
121 return 0;
122 }
123
124 return resource.start;
125 }
126
board_mmc_init(bd_t * bis)127 int board_mmc_init(bd_t *bis)
128 {
129 phys_addr_t sdhci_base_address = 0;
130
131 sdhci_base_address = bcmstb_sdhci_address(CONFIG_BCMSTB_SDHCI_INDEX);
132
133 if (!sdhci_base_address) {
134 sdhci_base_address = BCMSTB_SDHCI_BASE;
135 printf("%s: Assuming BCMSTB SDHCI address: 0x%p\n",
136 __func__, (void *)sdhci_base_address);
137 }
138
139 debug("BCMSTB SDHCI base address: 0x%p\n", (void *)sdhci_base_address);
140
141 bcmstb_sdhci_init(sdhci_base_address);
142
143 return 0;
144 }
145
timer_init(void)146 int timer_init(void)
147 {
148 gd->arch.timer_rate_hz = readl(BCMSTB_TIMER_FREQUENCY);
149
150 return 0;
151 }
152
get_tbclk(void)153 ulong get_tbclk(void)
154 {
155 return gd->arch.timer_rate_hz;
156 }
157
get_ticks(void)158 uint64_t get_ticks(void)
159 {
160 gd->timebase_h = readl(BCMSTB_TIMER_HIGH);
161 gd->timebase_l = readl(BCMSTB_TIMER_LOW);
162
163 return ((uint64_t)gd->timebase_h << 32) | gd->timebase_l;
164 }
165
board_late_init(void)166 int board_late_init(void)
167 {
168 debug("Arguments from prior stage bootloader:\n");
169 debug("General Purpose Register 0: 0x%x\n", bcmstb_boot_parameters.r0);
170 debug("General Purpose Register 1: 0x%x\n", bcmstb_boot_parameters.r1);
171 debug("General Purpose Register 2: 0x%x\n", bcmstb_boot_parameters.r2);
172 debug("General Purpose Register 3: 0x%x\n", bcmstb_boot_parameters.r3);
173 debug("Stack Pointer Register: 0x%x\n", bcmstb_boot_parameters.sp);
174 debug("Link Register: 0x%x\n", bcmstb_boot_parameters.lr);
175 debug("Assuming timer frequency register at: 0x%p\n",
176 (void *)BCMSTB_TIMER_FREQUENCY);
177 debug("Read timer frequency (in Hz): %ld\n", gd->arch.timer_rate_hz);
178 debug("Prior stage provided DTB at: 0x%p\n",
179 (void *)prior_stage_fdt_address);
180
181 /*
182 * Set fdtcontroladdr in the environment so that scripts can
183 * refer to it, for example, to reuse it for fdtaddr.
184 */
185 env_set_hex("fdtcontroladdr", prior_stage_fdt_address);
186
187 /*
188 * Do not set machid to the machine identifier value provided
189 * by the prior stage bootloader (bcmstb_boot_parameters.r1)
190 * because we're using a device tree to boot Linux.
191 */
192
193 return 0;
194 }
195