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192.168.1.100 / T108 / e958203796650e3959a43708d67534bf36f4c83b / . / target / linux / realtek / files-5.4 / arch / mips / rtl838x / prom.c
blob: 3390c043347ef259b7a5f5f6b6c101cbada61716 [file] [log] [blame]
b.liue9582032025-04-17 19:18:16 +0800[diff] [blame^]1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * prom.c
4 * Early intialization code for the Realtek RTL838X SoC
5 *
6 * based on the original BSP by
7 * Copyright (C) 2006-2012 Tony Wu (tonywu@realtek.com)
8 * Copyright (C) 2020 B. Koblitz
9 *
10 */
11
12#include <linux/init.h>
13#include <linux/kernel.h>
14#include <linux/string.h>
15#include <linux/of_fdt.h>
16#include <linux/libfdt.h>
17#include <asm/bootinfo.h>
18#include <asm/addrspace.h>
19#include <asm/page.h>
20#include <asm/cpu.h>
21
22#include <mach-rtl83xx.h>
23
24extern char arcs_cmdline[];
25extern const char __appended_dtb;
26
27struct rtl83xx_soc_info soc_info;
28const void *fdt;
29
30const char *get_system_type(void)
31{
32 return soc_info.name;
33}
34
35void __init prom_free_prom_memory(void)
36{
37
38}
39
40void __init device_tree_init(void)
41{
42 if (!fdt_check_header(&__appended_dtb)) {
43 fdt = &__appended_dtb;
44 pr_info("Using appended Device Tree.\n");
45 }
46 initial_boot_params = (void *)fdt;
47 unflatten_and_copy_device_tree();
48}
49
50static void __init prom_init_cmdline(void)
51{
52 int argc = fw_arg0;
53 char **argv = (char **) KSEG1ADDR(fw_arg1);
54 int i;
55
56 arcs_cmdline[0] = '\0';
57
58 for (i = 0; i < argc; i++) {
59 char *p = (char *) KSEG1ADDR(argv[i]);
60
61 if (CPHYSADDR(p) && *p) {
62 strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
63 strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
64 }
65 }
66 pr_info("Kernel command line: %s\n", arcs_cmdline);
67}
68
69void __init identify_rtl9302(void)
70{
71 switch (sw_r32(RTL93XX_MODEL_NAME_INFO) & 0xfffffff0) {
72 case 0x93020810:
73 soc_info.name = "RTL9302A 12x2.5G";
74 break;
75 case 0x93021010:
76 soc_info.name = "RTL9302B 8x2.5G";
77 break;
78 case 0x93021810:
79 soc_info.name = "RTL9302C 16x2.5G";
80 break;
81 case 0x93022010:
82 soc_info.name = "RTL9302D 24x2.5G";
83 break;
84 case 0x93020800:
85 soc_info.name = "RTL9302A";
86 break;
87 case 0x93021000:
88 soc_info.name = "RTL9302B";
89 break;
90 case 0x93021800:
91 soc_info.name = "RTL9302C";
92 break;
93 case 0x93022000:
94 soc_info.name = "RTL9302D";
95 break;
96 case 0x93023001:
97 soc_info.name = "RTL9302F";
98 break;
99 default:
100 soc_info.name = "RTL9302";
101 }
102}
103
104void __init prom_init(void)
105{
106 uint32_t model;
107
108 /* uart0 */
109 setup_8250_early_printk_port(0xb8002000, 2, 0);
110
111 model = sw_r32(RTL838X_MODEL_NAME_INFO);
112 pr_info("RTL838X model is %x\n", model);
113 model = model >> 16 & 0xFFFF;
114
115 if ((model != 0x8328) && (model != 0x8330) && (model != 0x8332)
116 && (model != 0x8380) && (model != 0x8382)) {
117 model = sw_r32(RTL839X_MODEL_NAME_INFO);
118 pr_info("RTL839X model is %x\n", model);
119 model = model >> 16 & 0xFFFF;
120 }
121
122 if ((model & 0x8390) != 0x8380 && (model & 0x8390) != 0x8390) {
123 model = sw_r32(RTL93XX_MODEL_NAME_INFO);
124 pr_info("RTL93XX model is %x\n", model);
125 model = model >> 16 & 0xFFFF;
126 }
127
128 soc_info.id = model;
129
130 switch (model) {
131 case 0x8328:
132 soc_info.name = "RTL8328";
133 soc_info.family = RTL8328_FAMILY_ID;
134 break;
135 case 0x8332:
136 soc_info.name = "RTL8332";
137 soc_info.family = RTL8380_FAMILY_ID;
138 break;
139 case 0x8380:
140 soc_info.name = "RTL8380";
141 soc_info.family = RTL8380_FAMILY_ID;
142 break;
143 case 0x8382:
144 soc_info.name = "RTL8382";
145 soc_info.family = RTL8380_FAMILY_ID;
146 break;
147 case 0x8390:
148 soc_info.name = "RTL8390";
149 soc_info.family = RTL8390_FAMILY_ID;
150 break;
151 case 0x8391:
152 soc_info.name = "RTL8391";
153 soc_info.family = RTL8390_FAMILY_ID;
154 break;
155 case 0x8392:
156 soc_info.name = "RTL8392";
157 soc_info.family = RTL8390_FAMILY_ID;
158 break;
159 case 0x8393:
160 soc_info.name = "RTL8393";
161 soc_info.family = RTL8390_FAMILY_ID;
162 break;
163 case 0x9301:
164 soc_info.name = "RTL9301";
165 soc_info.family = RTL9300_FAMILY_ID;
166 break;
167 case 0x9302:
168 identify_rtl9302();
169 soc_info.family = RTL9300_FAMILY_ID;
170 break;
171 case 0x9313:
172 soc_info.name = "RTL9313";
173 soc_info.family = RTL9310_FAMILY_ID;
174 break;
175 default:
176 soc_info.name = "DEFAULT";
177 soc_info.family = 0;
178 }
179
180 pr_info("SoC Type: %s\n", get_system_type());
181
182 prom_init_cmdline();
183}