setup.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * Copyright (C) 2000, 2001, 2002, 2003, 2004 Broadcom Corporation
  4 * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
  5 */
  6
  7/*
  8 * Setup code for the SWARM board
  9 */
 10
 11#include <linux/spinlock.h>
 12#include <linux/mm.h>
 13#include <linux/memblock.h>
 14#include <linux/init.h>
 15#include <linux/kernel.h>
 16#include <linux/console.h>
 17#include <linux/screen_info.h>
 18#include <linux/initrd.h>
 19
 20#include <asm/irq.h>
 21#include <asm/io.h>
 22#include <asm/bootinfo.h>
 23#include <asm/mipsregs.h>
 24#include <asm/reboot.h>
 25#include <asm/time.h>
 26#include <asm/traps.h>
 27#include <asm/sibyte/sb1250.h>
 28#ifdef CONFIG_SIBYTE_BCM1x80
 29#include <asm/sibyte/bcm1480_regs.h>
 30#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
 31#include <asm/sibyte/sb1250_regs.h>
 32#else
 33#error invalid SiByte board configuration
 34#endif
 35#include <asm/sibyte/sb1250_genbus.h>
 36#include <asm/sibyte/board.h>
 37
 38#ifdef CONFIG_SIBYTE_BCM1x80
 39extern void bcm1480_setup(void);
 40#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
 41extern void sb1250_setup(void);
 42#else
 43#error invalid SiByte board configuration
 44#endif
 45
 46extern int xicor_probe(void);
 47extern int xicor_set_time(time64_t);
 48extern time64_t xicor_get_time(void);
 49
 50extern int m41t81_probe(void);
 51extern int m41t81_set_time(time64_t);
 52extern time64_t m41t81_get_time(void);
 53
 54const char *get_system_type(void)
 55{
 56	return "SiByte " SIBYTE_BOARD_NAME;
 57}
 58
 59int swarm_be_handler(struct pt_regs *regs, int is_fixup)
 60{
 61	if (!is_fixup && (regs->cp0_cause & 4)) {
 62		/* Data bus error - print PA */
 63		printk("DBE physical address: %010Lx\n",
 64		       __read_64bit_c0_register($26, 1));
 65	}
 66	return is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL;
 67}
 68
 69enum swarm_rtc_type {
 70	RTC_NONE,
 71	RTC_XICOR,
 72	RTC_M41T81,
 73};
 74
 75enum swarm_rtc_type swarm_rtc_type;
 76
 77void read_persistent_clock64(struct timespec64 *ts)
 78{
 79	time64_t sec;
 80
 81	switch (swarm_rtc_type) {
 82	case RTC_XICOR:
 83		sec = xicor_get_time();
 84		break;
 85
 86	case RTC_M41T81:
 87		sec = m41t81_get_time();
 88		break;
 89
 90	case RTC_NONE:
 91	default:
 92		sec = mktime64(2000, 1, 1, 0, 0, 0);
 93		break;
 94	}
 95	ts->tv_sec = sec;
 96	ts->tv_nsec = 0;
 97}
 98
 99int update_persistent_clock64(struct timespec64 now)
100{
101	time64_t sec = now.tv_sec;
102
103	switch (swarm_rtc_type) {
104	case RTC_XICOR:
105		return xicor_set_time(sec);
106
107	case RTC_M41T81:
108		return m41t81_set_time(sec);
109
110	case RTC_NONE:
111	default:
112		return -1;
113	}
114}
115
116#ifdef CONFIG_VGA_CONSOLE
117static struct screen_info vgacon_screen_info = {
118	.orig_video_page	= 52,
119	.orig_video_mode	= 3,
120	.orig_video_cols	= 80,
121	.flags			= 12,
122	.orig_video_ega_bx	= 3,
123	.orig_video_lines	= 25,
124	.orig_video_isVGA	= 0x22,
125	.orig_video_points	= 16,
126};
127#endif
128
129void __init plat_mem_setup(void)
130{
131#ifdef CONFIG_SIBYTE_BCM1x80
132	bcm1480_setup();
133#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
134	sb1250_setup();
135#else
136#error invalid SiByte board configuration
137#endif
138
139	mips_set_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_M41T81;
145
146#ifdef CONFIG_VGA_CONSOLE
147	vgacon_register_screen(&vgacon_screen_info);
148       /* XXXKW for CFE, get lines/cols from environment */
149#endif
150}
151
152#ifdef LEDS_PHYS
153
154void setleds(char *str)
155{
156	void *reg;
157	int i;
158
159	for (i = 0; i < 4; i++) {
160		reg = IOADDR(LEDS_PHYS) + 0x20 + ((3 - i) << 3);
161
162		if (!str[i])
163			writeb(' ', reg);
164		else
165			writeb(str[i], reg);
166	}
167}
168
169#endif /* LEDS_PHYS */