1 /*
2 * Copyright (C) 2000, 2001, 2002, 2003, 2004 Broadcom Corporation
3 * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 */
19
20 /*
21 * Setup code for the SWARM board
22 */
23
24 #include <linux/spinlock.h>
25 #include <linux/mm.h>
26 #include <linux/bootmem.h>
27 #include <linux/blkdev.h>
28 #include <linux/init.h>
29 #include <linux/kernel.h>
30 #include <linux/screen_info.h>
31 #include <linux/initrd.h>
32
33 #include <asm/irq.h>
34 #include <asm/io.h>
35 #include <asm/bootinfo.h>
36 #include <asm/mipsregs.h>
37 #include <asm/reboot.h>
38 #include <asm/time.h>
39 #include <asm/traps.h>
40 #include <asm/sibyte/sb1250.h>
41 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
42 #include <asm/sibyte/bcm1480_regs.h>
43 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
44 #include <asm/sibyte/sb1250_regs.h>
45 #else
46 #error invalid SiByte board configuration
47 #endif
48 #include <asm/sibyte/sb1250_genbus.h>
49 #include <asm/sibyte/board.h>
50
51 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
52 extern void bcm1480_setup(void);
53 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
54 extern void sb1250_setup(void);
55 #else
56 #error invalid SiByte board configuration
57 #endif
58
59 extern int xicor_probe(void);
60 extern int xicor_set_time(unsigned long);
61 extern unsigned long xicor_get_time(void);
62
63 extern int m41t81_probe(void);
64 extern int m41t81_set_time(unsigned long);
65 extern unsigned long m41t81_get_time(void);
66
get_system_type(void)67 const char *get_system_type(void)
68 {
69 return "SiByte " SIBYTE_BOARD_NAME;
70 }
71
swarm_be_handler(struct pt_regs * regs,int is_fixup)72 int swarm_be_handler(struct pt_regs *regs, int is_fixup)
73 {
74 if (!is_fixup && (regs->cp0_cause & 4)) {
75 /* Data bus error - print PA */
76 printk("DBE physical address: %010Lx\n",
77 __read_64bit_c0_register($26, 1));
78 }
79 return (is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL);
80 }
81
82 enum swarm_rtc_type {
83 RTC_NONE,
84 RTC_XICOR,
85 RTC_M4LT81
86 };
87
88 enum swarm_rtc_type swarm_rtc_type;
89
read_persistent_clock(void)90 unsigned long read_persistent_clock(void)
91 {
92 switch (swarm_rtc_type) {
93 case RTC_XICOR:
94 return xicor_get_time();
95
96 case RTC_M4LT81:
97 return m41t81_get_time();
98
99 case RTC_NONE:
100 default:
101 return mktime(2000, 1, 1, 0, 0, 0);
102 }
103 }
104
rtc_mips_set_time(unsigned long sec)105 int rtc_mips_set_time(unsigned long sec)
106 {
107 switch (swarm_rtc_type) {
108 case RTC_XICOR:
109 return xicor_set_time(sec);
110
111 case RTC_M4LT81:
112 return m41t81_set_time(sec);
113
114 case RTC_NONE:
115 default:
116 return -1;
117 }
118 }
119
plat_mem_setup(void)120 void __init plat_mem_setup(void)
121 {
122 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
123 bcm1480_setup();
124 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
125 sb1250_setup();
126 #else
127 #error invalid SiByte board configuration
128 #endif
129
130 panic_timeout = 5; /* For debug. */
131
132 board_be_handler = swarm_be_handler;
133
134 if (xicor_probe())
135 swarm_rtc_type = RTC_XICOR;
136 if (m41t81_probe())
137 swarm_rtc_type = RTC_M4LT81;
138
139 printk("This kernel optimized for "
140 #ifdef CONFIG_SIMULATION
141 "simulation"
142 #else
143 "board"
144 #endif
145 " runs "
146 #ifdef CONFIG_SIBYTE_CFE
147 "with"
148 #else
149 "without"
150 #endif
151 " CFE\n");
152
153 #ifdef CONFIG_VT
154 screen_info = (struct screen_info) {
155 0, 0, /* orig-x, orig-y */
156 0, /* unused */
157 52, /* orig_video_page */
158 3, /* orig_video_mode */
159 80, /* orig_video_cols */
160 4626, 3, 9, /* unused, ega_bx, unused */
161 25, /* orig_video_lines */
162 0x22, /* orig_video_isVGA */
163 16 /* orig_video_points */
164 };
165 /* XXXKW for CFE, get lines/cols from environment */
166 #endif
167 }
168
169 #ifdef LEDS_PHYS
170
171 #ifdef CONFIG_SIBYTE_CARMEL
172 /* XXXKW need to detect Monterey/LittleSur/etc */
173 #undef LEDS_PHYS
174 #define LEDS_PHYS MLEDS_PHYS
175 #endif
176
setleds(char * str)177 void setleds(char *str)
178 {
179 void *reg;
180 int i;
181
182 for (i = 0; i < 4; i++) {
183 reg = IOADDR(LEDS_PHYS) + 0x20 + ((3 - i) << 3);
184
185 if (!str[i])
186 writeb(' ', reg);
187 else
188 writeb(str[i], reg);
189 }
190 }
191
192 #endif /* LEDS_PHYS */
193