diff options
Diffstat (limited to 'arch/mips/sibyte/swarm/setup.c')
| -rw-r--r-- | arch/mips/sibyte/swarm/setup.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/arch/mips/sibyte/swarm/setup.c b/arch/mips/sibyte/swarm/setup.c new file mode 100644 index 000000000..72a31eeee --- /dev/null +++ b/arch/mips/sibyte/swarm/setup.c @@ -0,0 +1,170 @@ +// 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 */ |