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1da177e4 LT |
1 | /* |
2 | * Copyright (C) 2000, 2001, 2002, 2003 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/config.h> | |
25 | #include <linux/spinlock.h> | |
26 | #include <linux/mm.h> | |
27 | #include <linux/bootmem.h> | |
28 | #include <linux/blkdev.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/kernel.h> | |
31 | #include <linux/tty.h> | |
32 | #include <linux/initrd.h> | |
33 | ||
34 | #include <asm/irq.h> | |
35 | #include <asm/io.h> | |
36 | #include <asm/bootinfo.h> | |
37 | #include <asm/mipsregs.h> | |
38 | #include <asm/reboot.h> | |
39 | #include <asm/time.h> | |
40 | #include <asm/traps.h> | |
41 | #include <asm/sibyte/sb1250.h> | |
42 | #include <asm/sibyte/sb1250_regs.h> | |
43 | #include <asm/sibyte/sb1250_genbus.h> | |
44 | #include <asm/sibyte/board.h> | |
45 | ||
46 | extern void sb1250_setup(void); | |
47 | ||
48 | extern int xicor_probe(void); | |
49 | extern int xicor_set_time(unsigned long); | |
50 | extern unsigned long xicor_get_time(void); | |
51 | ||
52 | extern int m41t81_probe(void); | |
53 | extern int m41t81_set_time(unsigned long); | |
54 | extern unsigned long m41t81_get_time(void); | |
55 | ||
56 | const char *get_system_type(void) | |
57 | { | |
58 | return "SiByte " SIBYTE_BOARD_NAME; | |
59 | } | |
60 | ||
61 | void __init swarm_timer_setup(struct irqaction *irq) | |
62 | { | |
63 | /* | |
64 | * we don't set up irqaction, because we will deliver timer | |
65 | * interrupts through low-level (direct) meachanism. | |
66 | */ | |
67 | ||
68 | /* We only need to setup the generic timer */ | |
69 | sb1250_time_init(); | |
70 | } | |
71 | ||
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 */ | |
875d43e7 | 76 | #ifdef CONFIG_64BIT |
1da177e4 LT |
77 | printk("DBE physical address: %010lx\n", |
78 | __read_64bit_c0_register($26, 1)); | |
79 | #else | |
80 | printk("DBE physical address: %010llx\n", | |
81 | __read_64bit_c0_split($26, 1)); | |
82 | #endif | |
83 | } | |
84 | return (is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL); | |
85 | } | |
86 | ||
87 | static int __init swarm_setup(void) | |
88 | { | |
89 | sb1250_setup(); | |
90 | ||
91 | panic_timeout = 5; /* For debug. */ | |
92 | ||
93 | board_timer_setup = swarm_timer_setup; | |
94 | board_be_handler = swarm_be_handler; | |
95 | ||
96 | if (xicor_probe()) { | |
97 | printk("swarm setup: Xicor 1241 RTC detected.\n"); | |
98 | rtc_get_time = xicor_get_time; | |
99 | rtc_set_time = xicor_set_time; | |
100 | } | |
42a3b4f2 | 101 | |
1da177e4 LT |
102 | if (m41t81_probe()) { |
103 | printk("swarm setup: M41T81 RTC detected.\n"); | |
104 | rtc_get_time = m41t81_get_time; | |
105 | rtc_set_time = m41t81_set_time; | |
106 | } | |
107 | ||
108 | printk("This kernel optimized for " | |
109 | #ifdef CONFIG_SIMULATION | |
110 | "simulation" | |
111 | #else | |
112 | "board" | |
113 | #endif | |
114 | " runs " | |
115 | #ifdef CONFIG_SIBYTE_CFE | |
116 | "with" | |
117 | #else | |
118 | "without" | |
119 | #endif | |
120 | " CFE\n"); | |
121 | ||
122 | #ifdef CONFIG_VT | |
123 | screen_info = (struct screen_info) { | |
124 | 0, 0, /* orig-x, orig-y */ | |
125 | 0, /* unused */ | |
126 | 52, /* orig_video_page */ | |
127 | 3, /* orig_video_mode */ | |
128 | 80, /* orig_video_cols */ | |
129 | 4626, 3, 9, /* unused, ega_bx, unused */ | |
130 | 25, /* orig_video_lines */ | |
131 | 0x22, /* orig_video_isVGA */ | |
132 | 16 /* orig_video_points */ | |
133 | }; | |
134 | /* XXXKW for CFE, get lines/cols from environment */ | |
135 | #endif | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
140 | early_initcall(swarm_setup); | |
141 | ||
142 | #ifdef LEDS_PHYS | |
143 | ||
144 | #ifdef CONFIG_SIBYTE_CARMEL | |
145 | /* XXXKW need to detect Monterey/LittleSur/etc */ | |
146 | #undef LEDS_PHYS | |
147 | #define LEDS_PHYS MLEDS_PHYS | |
148 | #endif | |
149 | ||
150 | #define setled(index, c) \ | |
151 | ((unsigned char *)(IOADDR(LEDS_PHYS)+0x20))[(3-(index))<<3] = (c) | |
152 | void setleds(char *str) | |
153 | { | |
154 | int i; | |
155 | for (i = 0; i < 4; i++) { | |
156 | if (!str[i]) { | |
157 | setled(i, ' '); | |
158 | } else { | |
159 | setled(i, str[i]); | |
160 | } | |
161 | } | |
162 | } | |
163 | #endif |