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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2000, 2001, 2002, 2003, 2004 Broadcom Corporation
* Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
*/
/*
* Setup code for the SWARM board
*/
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/memblock.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/screen_info.h>
#include <linux/initrd.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/bootinfo.h>
#include <asm/mipsregs.h>
#include <asm/reboot.h>
#include <asm/time.h>
#include <asm/traps.h>
#include <asm/sibyte/sb1250.h>
#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
#include <asm/sibyte/bcm1480_regs.h>
#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
#include <asm/sibyte/sb1250_regs.h>
#else
#error invalid SiByte board configuration
#endif
#include <asm/sibyte/sb1250_genbus.h>
#include <asm/sibyte/board.h>
#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
extern void bcm1480_setup(void);
#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
extern void sb1250_setup(void);
#else
#error invalid SiByte board configuration
#endif
extern int xicor_probe(void);
extern int xicor_set_time(time64_t);
extern time64_t xicor_get_time(void);
extern int m41t81_probe(void);
extern int m41t81_set_time(time64_t);
extern time64_t m41t81_get_time(void);
const char *get_system_type(void)
{
return "SiByte " SIBYTE_BOARD_NAME;
}
int swarm_be_handler(struct pt_regs *regs, int is_fixup)
{
if (!is_fixup && (regs->cp0_cause & 4)) {
/* Data bus error - print PA */
printk("DBE physical address: %010Lx\n",
__read_64bit_c0_register($26, 1));
}
return is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL;
}
enum swarm_rtc_type {
RTC_NONE,
RTC_XICOR,
RTC_M41T81,
};
enum swarm_rtc_type swarm_rtc_type;
void read_persistent_clock64(struct timespec64 *ts)
{
time64_t sec;
switch (swarm_rtc_type) {
case RTC_XICOR:
sec = xicor_get_time();
break;
case RTC_M41T81:
sec = m41t81_get_time();
break;
case RTC_NONE:
default:
sec = mktime64(2000, 1, 1, 0, 0, 0);
break;
}
ts->tv_sec = sec;
ts->tv_nsec = 0;
}
int update_persistent_clock64(struct timespec64 now)
{
time64_t sec = now.tv_sec;
switch (swarm_rtc_type) {
case RTC_XICOR:
return xicor_set_time(sec);
case RTC_M41T81:
return m41t81_set_time(sec);
case RTC_NONE:
default:
return -1;
}
}
void __init plat_mem_setup(void)
{
#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
bcm1480_setup();
#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
sb1250_setup();
#else
#error invalid SiByte board configuration
#endif
mips_set_be_handler(swarm_be_handler);
if (xicor_probe())
swarm_rtc_type = RTC_XICOR;
if (m41t81_probe())
swarm_rtc_type = RTC_M41T81;
#ifdef CONFIG_VT
screen_info = (struct screen_info) {
.orig_video_page = 52,
.orig_video_mode = 3,
.orig_video_cols = 80,
.flags = 12,
.orig_video_ega_bx = 3,
.orig_video_lines = 25,
.orig_video_isVGA = 0x22,
.orig_video_points = 16,
};
/* XXXKW for CFE, get lines/cols from environment */
#endif
}
#ifdef LEDS_PHYS
#ifdef CONFIG_SIBYTE_CARMEL
/* XXXKW need to detect Monterey/LittleSur/etc */
#undef LEDS_PHYS
#define LEDS_PHYS MLEDS_PHYS
#endif
void setleds(char *str)
{
void *reg;
int i;
for (i = 0; i < 4; i++) {
reg = IOADDR(LEDS_PHYS) + 0x20 + ((3 - i) << 3);
if (!str[i])
writeb(' ', reg);
else
writeb(str[i], reg);
}
}
#endif /* LEDS_PHYS */
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