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-rw-r--r--arch/mips/sibyte/swarm/setup.c170
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 */