116 lines
2.6 KiB
C
116 lines
2.6 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) NEC Electronics Corporation 2004-2006
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*
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* This file is based on the arch/mips/ddb5xxx/ddb5477/setup.c.
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*
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* Copyright 2001 MontaVista Software Inc.
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <asm/time.h>
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#include <asm/reboot.h>
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#include <asm/emma/emma2rh.h>
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#define USE_CPU_COUNTER_TIMER /* whether we use cpu counter */
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extern void markeins_led(const char *);
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static int bus_frequency;
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static void markeins_machine_restart(char *command)
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{
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static void (*back_to_prom) (void) = (void (*)(void))0xbfc00000;
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printk("cannot EMMA2RH Mark-eins restart.\n");
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markeins_led("restart.");
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back_to_prom();
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}
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static void markeins_machine_halt(void)
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{
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printk("EMMA2RH Mark-eins halted.\n");
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markeins_led("halted.");
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while (1) ;
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}
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static void markeins_machine_power_off(void)
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{
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markeins_led("poweroff.");
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while (1) ;
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}
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static unsigned long __initdata emma2rh_clock[4] = {
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166500000, 187312500, 199800000, 210600000
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};
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static unsigned int __init detect_bus_frequency(unsigned long rtc_base)
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{
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u32 reg;
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/* detect from boot strap */
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reg = emma2rh_in32(EMMA2RH_BHIF_STRAP_0);
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reg = (reg >> 4) & 0x3;
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return emma2rh_clock[reg];
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}
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void __init plat_time_init(void)
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{
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u32 reg;
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if (bus_frequency == 0)
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bus_frequency = detect_bus_frequency(0);
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reg = emma2rh_in32(EMMA2RH_BHIF_STRAP_0);
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if ((reg & 0x3) == 0)
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reg = (reg >> 6) & 0x3;
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else {
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reg = emma2rh_in32(EMMA2RH_BHIF_MAIN_CTRL);
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reg = (reg >> 4) & 0x3;
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}
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mips_hpt_frequency = (bus_frequency * (4 + reg)) / 4 / 2;
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}
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static void markeins_board_init(void);
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extern void markeins_irq_setup(void);
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static inline void __init markeins_sio_setup(void)
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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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/* initialize board - we don't trust the loader */
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markeins_board_init();
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set_io_port_base(KSEG1ADDR(EMMA2RH_PCI_IO_BASE));
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_machine_restart = markeins_machine_restart;
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_machine_halt = markeins_machine_halt;
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pm_power_off = markeins_machine_power_off;
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/* setup resource limits */
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ioport_resource.start = EMMA2RH_PCI_IO_BASE;
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ioport_resource.end = EMMA2RH_PCI_IO_BASE + EMMA2RH_PCI_IO_SIZE - 1;
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iomem_resource.start = EMMA2RH_IO_BASE;
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iomem_resource.end = EMMA2RH_ROM_BASE - 1;
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markeins_sio_setup();
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}
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static void __init markeins_board_init(void)
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{
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u32 val;
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val = emma2rh_in32(EMMA2RH_PBRD_INT_EN); /* open serial interrupts. */
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emma2rh_out32(EMMA2RH_PBRD_INT_EN, val | 0xaa);
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val = emma2rh_in32(EMMA2RH_PBRD_CLKSEL); /* set serial clocks. */
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emma2rh_out32(EMMA2RH_PBRD_CLKSEL, val | 0x5); /* 18MHz */
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emma2rh_out32(EMMA2RH_PCI_CONTROL, 0);
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markeins_led("MVL E2RH");
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}
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