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