181 lines
4.7 KiB
C
181 lines
4.7 KiB
C
/*
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* arch/mips/emma2rh/markeins/setup.c
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* This file is setup for EMMA2RH Mark-eins.
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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 <linux/initrd.h>
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#include <linux/irq.h>
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#include <linux/ide.h>
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#include <linux/ioport.h>
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#include <linux/param.h> /* for HZ */
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#include <linux/root_dev.h>
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#include <linux/serial.h>
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#include <linux/serial_core.h>
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#include <asm/cpu.h>
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#include <asm/bootinfo.h>
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#include <asm/addrspace.h>
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#include <asm/time.h>
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#include <asm/bcache.h>
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#include <asm/irq.h>
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#include <asm/reboot.h>
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#include <asm/gdb-stub.h>
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#include <asm/traps.h>
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#include <asm/debug.h>
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#include <asm/emma2rh/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 = 0;
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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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printk("EMMA2RH Mark-eins halted. Please turn off the power.\n");
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markeins_led("poweroff.");
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while (1) ;
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}
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static unsigned long clock[4] = { 166500000, 187312500, 199800000, 210600000 };
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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 clock[reg];
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}
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static void __init emma2rh_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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void __init plat_timer_setup(struct irqaction *irq)
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{
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/* we are using the cpu counter for timer interrupts */
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setup_irq(CPU_IRQ_BASE + 7, irq);
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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 void inline __init markeins_sio_setup(void)
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{
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#ifdef CONFIG_KGDB_8250
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struct uart_port emma_port;
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memset(&emma_port, 0, sizeof(emma_port));
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emma_port.flags =
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UPF_BOOT_AUTOCONF | UPF_SKIP_TEST;
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emma_port.iotype = UPIO_MEM;
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emma_port.regshift = 4; /* I/O addresses are every 8 bytes */
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emma_port.uartclk = 18544000; /* Clock rate of the chip */
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emma_port.line = 0;
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emma_port.mapbase = KSEG1ADDR(EMMA2RH_PFUR0_BASE + 3);
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emma_port.membase = (u8*)emma_port.mapbase;
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early_serial_setup(&emma_port);
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emma_port.line = 1;
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emma_port.mapbase = KSEG1ADDR(EMMA2RH_PFUR1_BASE + 3);
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emma_port.membase = (u8*)emma_port.mapbase;
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early_serial_setup(&emma_port);
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emma_port.irq = EMMA2RH_IRQ_PFUR1;
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kgdb8250_add_port(1, &emma_port);
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#endif
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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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board_time_init = emma2rh_time_init;
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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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/* Reboot on panic */
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panic_timeout = 180;
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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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