xref: /openbmc/linux/arch/mips/sibyte/swarm/setup.c (revision 64c70b1c)
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 
67 const char *get_system_type(void)
68 {
69 	return "SiByte " SIBYTE_BOARD_NAME;
70 }
71 
72 void __init swarm_time_init(void)
73 {
74 #if defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
75 	/* Setup HPT */
76 	sb1250_hpt_setup();
77 #endif
78 }
79 
80 void __init plat_timer_setup(struct irqaction *irq)
81 {
82         /*
83          * we don't set up irqaction, because we will deliver timer
84          * interrupts through low-level (direct) meachanism.
85          */
86 
87         /* We only need to setup the generic timer */
88 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
89 	bcm1480_time_init();
90 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
91 	sb1250_time_init();
92 #else
93 #error invalid SiByte board configuration
94 #endif
95 }
96 
97 int swarm_be_handler(struct pt_regs *regs, int is_fixup)
98 {
99 	if (!is_fixup && (regs->cp0_cause & 4)) {
100 		/* Data bus error - print PA */
101 		printk("DBE physical address: %010Lx\n",
102 		       __read_64bit_c0_register($26, 1));
103 	}
104 	return (is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL);
105 }
106 
107 void __init plat_mem_setup(void)
108 {
109 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
110 	bcm1480_setup();
111 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
112 	sb1250_setup();
113 #else
114 #error invalid SiByte board configuration
115 #endif
116 
117 	panic_timeout = 5;  /* For debug.  */
118 
119 	board_time_init = swarm_time_init;
120 	board_be_handler = swarm_be_handler;
121 
122 	if (xicor_probe()) {
123 		printk("swarm setup: Xicor 1241 RTC detected.\n");
124 		rtc_mips_get_time = xicor_get_time;
125 		rtc_mips_set_time = xicor_set_time;
126 	}
127 
128 	if (m41t81_probe()) {
129 		printk("swarm setup: M41T81 RTC detected.\n");
130 		rtc_mips_get_time = m41t81_get_time;
131 		rtc_mips_set_time = m41t81_set_time;
132 	}
133 
134 	printk("This kernel optimized for "
135 #ifdef CONFIG_SIMULATION
136 	       "simulation"
137 #else
138 	       "board"
139 #endif
140 	       " runs "
141 #ifdef CONFIG_SIBYTE_CFE
142 	       "with"
143 #else
144 	       "without"
145 #endif
146 	       " CFE\n");
147 
148 #ifdef CONFIG_VT
149 	screen_info = (struct screen_info) {
150 		0, 0,           /* orig-x, orig-y */
151 		0,              /* unused */
152 		52,             /* orig_video_page */
153 		3,              /* orig_video_mode */
154 		80,             /* orig_video_cols */
155 		4626, 3, 9,     /* unused, ega_bx, unused */
156 		25,             /* orig_video_lines */
157 		0x22,           /* orig_video_isVGA */
158 		16              /* orig_video_points */
159        };
160        /* XXXKW for CFE, get lines/cols from environment */
161 #endif
162 }
163 
164 #ifdef LEDS_PHYS
165 
166 #ifdef CONFIG_SIBYTE_CARMEL
167 /* XXXKW need to detect Monterey/LittleSur/etc */
168 #undef LEDS_PHYS
169 #define LEDS_PHYS MLEDS_PHYS
170 #endif
171 
172 void setleds(char *str)
173 {
174 	void *reg;
175 	int i;
176 
177 	for (i = 0; i < 4; i++) {
178 		reg = IOADDR(LEDS_PHYS) + 0x20 + ((3 - i) << 3);
179 
180 		if (!str[i])
181 			writeb(' ', reg);
182 		else
183 			writeb(str[i], reg);
184 	}
185 }
186 
187 #endif /* LEDS_PHYS */
188