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/arch/mips/sibyte/swarm/setup.c

https://bitbucket.org/thekraven/iscream_thunderc-2.6.35
C | 184 lines | 132 code | 28 blank | 24 comment | 14 complexity | 2ac6eef0965ae9ebb1f85d800a210ef2 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
  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_M4LT81
 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_M4LT81:
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_M4LT81:
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	panic_timeout = 5;  /* For debug.  */
138
139	board_be_handler = swarm_be_handler;
140
141	if (xicor_probe())
142		swarm_rtc_type = RTC_XICOR;
143	if (m41t81_probe())
144		swarm_rtc_type = RTC_M4LT81;
145
146#ifdef CONFIG_VT
147	screen_info = (struct screen_info) {
148		.orig_video_page	= 52,
149		.orig_video_mode	= 3,
150		.orig_video_cols	= 80,
151		.flags			= 12,
152		.orig_video_ega_bx	= 3,
153		.orig_video_lines	= 25,
154		.orig_video_isVGA	= 0x22,
155		.orig_video_points	= 16,
156       };
157       /* XXXKW for CFE, get lines/cols from environment */
158#endif
159}
160
161#ifdef LEDS_PHYS
162
163#ifdef CONFIG_SIBYTE_CARMEL
164/* XXXKW need to detect Monterey/LittleSur/etc */
165#undef LEDS_PHYS
166#define LEDS_PHYS MLEDS_PHYS
167#endif
168
169void setleds(char *str)
170{
171	void *reg;
172	int i;
173
174	for (i = 0; i < 4; i++) {
175		reg = IOADDR(LEDS_PHYS) + 0x20 + ((3 - i) << 3);
176
177		if (!str[i])
178			writeb(' ', reg);
179		else
180			writeb(str[i], reg);
181	}
182}
183
184#endif /* LEDS_PHYS */