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
72int 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
82enum swarm_rtc_type {
83	RTC_NONE,
84	RTC_XICOR,
85	RTC_M41T81,
86};
87
88enum swarm_rtc_type swarm_rtc_type;
89
90void read_persistent_clock(struct timespec *ts)
91{
92	unsigned long sec;
93
94	switch (swarm_rtc_type) {
95	case RTC_XICOR:
96		sec = xicor_get_time();
97		break;
98
99	case RTC_M41T81:
100		sec = m41t81_get_time();
101		break;
102
103	case RTC_NONE:
104	default:
105		sec = mktime(2000, 1, 1, 0, 0, 0);
106		break;
107	}
108	ts->tv_sec = sec;
109	ts->tv_nsec = 0;
110}
111
112int rtc_mips_set_time(unsigned long sec)
113{
114	switch (swarm_rtc_type) {
115	case RTC_XICOR:
116		return xicor_set_time(sec);
117
118	case RTC_M41T81:
119		return m41t81_set_time(sec);
120
121	case RTC_NONE:
122	default:
123		return -1;
124	}
125}
126
127void __init plat_mem_setup(void)
128{
129#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
130	bcm1480_setup();
131#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
132	sb1250_setup();
133#else
134#error invalid SiByte board configuration
135#endif
136
137	board_be_handler = swarm_be_handler;
138
139	if (xicor_probe())
140		swarm_rtc_type = RTC_XICOR;
141	if (m41t81_probe())
142		swarm_rtc_type = RTC_M41T81;
143
144#ifdef CONFIG_VT
145	screen_info = (struct screen_info) {
146		.orig_video_page	= 52,
147		.orig_video_mode	= 3,
148		.orig_video_cols	= 80,
149		.flags			= 12,
150		.orig_video_ega_bx	= 3,
151		.orig_video_lines	= 25,
152		.orig_video_isVGA	= 0x22,
153		.orig_video_points	= 16,
154       };
155       /* XXXKW for CFE, get lines/cols from environment */
156#endif
157}
158
159#ifdef LEDS_PHYS
160
161#ifdef CONFIG_SIBYTE_CARMEL
162/* XXXKW need to detect Monterey/LittleSur/etc */
163#undef LEDS_PHYS
164#define LEDS_PHYS MLEDS_PHYS
165#endif
166
167void setleds(char *str)
168{
169	void *reg;
170	int i;
171
172	for (i = 0; i < 4; i++) {
173		reg = IOADDR(LEDS_PHYS) + 0x20 + ((3 - i) << 3);
174
175		if (!str[i])
176			writeb(' ', reg);
177		else
178			writeb(str[i], reg);
179	}
180}
181
182#endif /* LEDS_PHYS */
183