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)
52extern void bcm1480_setup(void);
53#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
54extern void sb1250_setup(void);
55#else
56#error invalid SiByte board configuration
57#endif
58
59extern int xicor_probe(void);
60extern int xicor_set_time(unsigned long);
61extern unsigned long xicor_get_time(void);
62
63extern int m41t81_probe(void);
64extern int m41t81_set_time(unsigned long);
65extern unsigned long m41t81_get_time(void);
66
67const char *get_system_type(void)
68{
69	return "SiByte " SIBYTE_BOARD_NAME;
70}
71
72void __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
80void __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
97int 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
107void __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
172void 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