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192.168.1.100 / T108 / c2023d5d03be91dbb983606f0ec5e9e4ea36c8c2 / . / marvell / linux / arch / mips / sibyte / bcm1480 / setup.c
blob: 6f34b871b08ec000921bc493b3b981b112f09686 [file] [log] [blame]
b.liue9582032025-04-17 19:18:16 +0800[diff] [blame]1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2000,2001,2002,2003,2004 Broadcom Corporation
4 */
5#include <linux/init.h>
6#include <linux/kernel.h>
7#include <linux/export.h>
8#include <linux/reboot.h>
9#include <linux/string.h>
10
11#include <asm/bootinfo.h>
12#include <asm/cpu.h>
13#include <asm/mipsregs.h>
14#include <asm/io.h>
15#include <asm/sibyte/sb1250.h>
16
17#include <asm/sibyte/bcm1480_regs.h>
18#include <asm/sibyte/bcm1480_scd.h>
19#include <asm/sibyte/sb1250_scd.h>
20
21unsigned int sb1_pass;
22unsigned int soc_pass;
23unsigned int soc_type;
24EXPORT_SYMBOL(soc_type);
25unsigned int periph_rev;
26EXPORT_SYMBOL_GPL(periph_rev);
27unsigned int zbbus_mhz;
28EXPORT_SYMBOL(zbbus_mhz);
29
30static unsigned int part_type;
31
32static char *soc_str;
33static char *pass_str;
34
35static int __init setup_bcm1x80_bcm1x55(void)
36{
37 int ret = 0;
38
39 switch (soc_pass) {
40 case K_SYS_REVISION_BCM1480_S0:
41 periph_rev = 1;
42 pass_str = "S0 (pass1)";
43 break;
44 case K_SYS_REVISION_BCM1480_A1:
45 periph_rev = 1;
46 pass_str = "A1 (pass1)";
47 break;
48 case K_SYS_REVISION_BCM1480_A2:
49 periph_rev = 1;
50 pass_str = "A2 (pass1)";
51 break;
52 case K_SYS_REVISION_BCM1480_A3:
53 periph_rev = 1;
54 pass_str = "A3 (pass1)";
55 break;
56 case K_SYS_REVISION_BCM1480_B0:
57 periph_rev = 1;
58 pass_str = "B0 (pass2)";
59 break;
60 default:
61 printk("Unknown %s rev %x\n", soc_str, soc_pass);
62 periph_rev = 1;
63 pass_str = "Unknown Revision";
64 break;
65 }
66
67 return ret;
68}
69
70/* Setup code likely to be common to all SiByte platforms */
71
72static int __init sys_rev_decode(void)
73{
74 int ret = 0;
75
76 switch (soc_type) {
77 case K_SYS_SOC_TYPE_BCM1x80:
78 if (part_type == K_SYS_PART_BCM1480)
79 soc_str = "BCM1480";
80 else if (part_type == K_SYS_PART_BCM1280)
81 soc_str = "BCM1280";
82 else
83 soc_str = "BCM1x80";
84 ret = setup_bcm1x80_bcm1x55();
85 break;
86
87 case K_SYS_SOC_TYPE_BCM1x55:
88 if (part_type == K_SYS_PART_BCM1455)
89 soc_str = "BCM1455";
90 else if (part_type == K_SYS_PART_BCM1255)
91 soc_str = "BCM1255";
92 else
93 soc_str = "BCM1x55";
94 ret = setup_bcm1x80_bcm1x55();
95 break;
96
97 default:
98 printk("Unknown part type %x\n", part_type);
99 ret = 1;
100 break;
101 }
102
103 return ret;
104}
105
106void __init bcm1480_setup(void)
107{
108 uint64_t sys_rev;
109 int plldiv;
110
111 sb1_pass = read_c0_prid() & PRID_REV_MASK;
112 sys_rev = __raw_readq(IOADDR(A_SCD_SYSTEM_REVISION));
113 soc_type = SYS_SOC_TYPE(sys_rev);
114 part_type = G_SYS_PART(sys_rev);
115 soc_pass = G_SYS_REVISION(sys_rev);
116
117 if (sys_rev_decode()) {
118 printk("Restart after failure to identify SiByte chip\n");
119 machine_restart(NULL);
120 }
121
122 plldiv = G_BCM1480_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG)));
123 zbbus_mhz = ((plldiv >> 1) * 50) + ((plldiv & 1) * 25);
124
125 printk("Broadcom SiByte %s %s @ %d MHz (SB-1A rev %d)\n",
126 soc_str, pass_str, zbbus_mhz * 2, sb1_pass);
127 printk("Board type: %s\n", get_system_type());
128}