1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) 2000, 2001, 2002, 2003, 2004 Broadcom Corporation
4 * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
5 */
6
7 /*
8 * Setup code for the SWARM board
9 */
10
11 #include <linux/spinlock.h>
12 #include <linux/mm.h>
13 #include <linux/memblock.h>
14 #include <linux/init.h>
15 #include <linux/kernel.h>
16 #include <linux/screen_info.h>
17 #include <linux/initrd.h>
18
19 #include <asm/irq.h>
20 #include <asm/io.h>
21 #include <asm/bootinfo.h>
22 #include <asm/mipsregs.h>
23 #include <asm/reboot.h>
24 #include <asm/time.h>
25 #include <asm/traps.h>
26 #include <asm/sibyte/sb1250.h>
27 #ifdef CONFIG_SIBYTE_BCM1x80
28 #include <asm/sibyte/bcm1480_regs.h>
29 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
30 #include <asm/sibyte/sb1250_regs.h>
31 #else
32 #error invalid SiByte board configuration
33 #endif
34 #include <asm/sibyte/sb1250_genbus.h>
35 #include <asm/sibyte/board.h>
36
37 #ifdef CONFIG_SIBYTE_BCM1x80
38 extern void bcm1480_setup(void);
39 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
40 extern void sb1250_setup(void);
41 #else
42 #error invalid SiByte board configuration
43 #endif
44
45 extern int xicor_probe(void);
46 extern int xicor_set_time(time64_t);
47 extern time64_t xicor_get_time(void);
48
49 extern int m41t81_probe(void);
50 extern int m41t81_set_time(time64_t);
51 extern time64_t m41t81_get_time(void);
52
get_system_type(void)53 const char *get_system_type(void)
54 {
55 return "SiByte " SIBYTE_BOARD_NAME;
56 }
57
swarm_be_handler(struct pt_regs * regs,int is_fixup)58 int swarm_be_handler(struct pt_regs *regs, int is_fixup)
59 {
60 if (!is_fixup && (regs->cp0_cause & 4)) {
61 /* Data bus error - print PA */
62 printk("DBE physical address: %010Lx\n",
63 __read_64bit_c0_register($26, 1));
64 }
65 return is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL;
66 }
67
68 enum swarm_rtc_type {
69 RTC_NONE,
70 RTC_XICOR,
71 RTC_M41T81,
72 };
73
74 enum swarm_rtc_type swarm_rtc_type;
75
read_persistent_clock64(struct timespec64 * ts)76 void read_persistent_clock64(struct timespec64 *ts)
77 {
78 time64_t sec;
79
80 switch (swarm_rtc_type) {
81 case RTC_XICOR:
82 sec = xicor_get_time();
83 break;
84
85 case RTC_M41T81:
86 sec = m41t81_get_time();
87 break;
88
89 case RTC_NONE:
90 default:
91 sec = mktime64(2000, 1, 1, 0, 0, 0);
92 break;
93 }
94 ts->tv_sec = sec;
95 ts->tv_nsec = 0;
96 }
97
update_persistent_clock64(struct timespec64 now)98 int update_persistent_clock64(struct timespec64 now)
99 {
100 time64_t sec = now.tv_sec;
101
102 switch (swarm_rtc_type) {
103 case RTC_XICOR:
104 return xicor_set_time(sec);
105
106 case RTC_M41T81:
107 return m41t81_set_time(sec);
108
109 case RTC_NONE:
110 default:
111 return -1;
112 }
113 }
114
plat_mem_setup(void)115 void __init plat_mem_setup(void)
116 {
117 #ifdef CONFIG_SIBYTE_BCM1x80
118 bcm1480_setup();
119 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
120 sb1250_setup();
121 #else
122 #error invalid SiByte board configuration
123 #endif
124
125 mips_set_be_handler(swarm_be_handler);
126
127 if (xicor_probe())
128 swarm_rtc_type = RTC_XICOR;
129 if (m41t81_probe())
130 swarm_rtc_type = RTC_M41T81;
131
132 #ifdef CONFIG_VT
133 screen_info = (struct screen_info) {
134 .orig_video_page = 52,
135 .orig_video_mode = 3,
136 .orig_video_cols = 80,
137 .flags = 12,
138 .orig_video_ega_bx = 3,
139 .orig_video_lines = 25,
140 .orig_video_isVGA = 0x22,
141 .orig_video_points = 16,
142 };
143 /* XXXKW for CFE, get lines/cols from environment */
144 #endif
145 }
146
147 #ifdef LEDS_PHYS
148
setleds(char * str)149 void setleds(char *str)
150 {
151 void *reg;
152 int i;
153
154 for (i = 0; i < 4; i++) {
155 reg = IOADDR(LEDS_PHYS) + 0x20 + ((3 - i) << 3);
156
157 if (!str[i])
158 writeb(' ', reg);
159 else
160 writeb(str[i], reg);
161 }
162 }
163
164 #endif /* LEDS_PHYS */
165
