target/linux/realtek/files-5.10/arch/mips/rtl838x/prom.c

   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
  24 extern char arcs_cmdline[];
  25 extern const char __appended_dtb;
  26
  27 struct rtl83xx_soc_info soc_info;
  28 const void *fdt;
  29
  30 const char *get_system_type(void)
  31 {
  32         return soc_info.name;
  33 }
  34
  35 void __init prom_free_prom_memory(void)
  36 {
  37
  38 }
  39
  40 void __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
  50 static 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
  69 void __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
 104 void __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 }