+++ /dev/null
-/*
- * Copyright (C) 2004 Peng Liu <peng.liu@infineon.com>
- * Copyright (C) 2007 John Crispin <blogic@openwrt.org>
- * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
- *
- */
-
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-
-#include <asm/reboot.h>
-#include <asm/system.h>
-#include <asm/time.h>
-#include <asm/cpu.h>
-#include <asm/bootinfo.h>
-#include <asm/irq.h>
-#include <asm/mipsregs.h>
-#include <asm/amazon/amazon.h>
-#include <asm/amazon/irq.h>
-#include <asm/amazon/model.h>
-
-static unsigned int r4k_offset;
-static unsigned int r4k_cur;
-
-/* required in arch/mips/kernel/kspd.c */
-unsigned long cpu_khz;
-
-static void amazon_reboot_setup(void);
-
-/* the CPU clock rate - lifted from u-boot */
-unsigned int amazon_get_cpu_hz(void)
-{
- /*-----------------------------------*/
- /**CGU CPU Clock Reduction Register***/
- /*-----------------------------------*/
- switch(amazon_readl(AMAZON_CGU_CPUCRD) & 0x3){
- case 0:
- /*divider ration 1/1, 235 MHz clock */
- return 235000000;
- case 1:
- /*divider ration 2/3, 235 MHz clock, clock not accurate, here */
- return 150000000;
- case 2:
- /*divider ration 1/2, 235 MHz clock */
- return 117500000;
- default:
- /*divider ration 1/4, 235 MHz clock */
- return 58750000;
- }
-}
-
-/* the FPI clock rate - lifted from u-boot */
-unsigned int amazon_get_fpi_hz(void)
-{
- unsigned int clkCPU;
- clkCPU = amazon_get_cpu_hz();
-
- /*-------------------------------------*/
- /***CGU Clock Divider Select Register***/
- /*-------------------------------------*/
- switch (amazon_readl(AMAZON_CGU_DIV) & 0x3)
- {
- case 1:
- return clkCPU >> 1;
- case 2:
- return clkCPU >> 2;
- default:
- return clkCPU;
- /* '11' is reserved */
- }
-}
-EXPORT_SYMBOL(amazon_get_fpi_hz);
-
-/* this doesn't really belong here, but it's a convenient location */
-unsigned int amazon_get_cpu_ver(void)
-{
- static unsigned int cpu_ver = 0;
- if (cpu_ver == 0)
- cpu_ver = amazon_readl(AMAZON_MCD_CHIPID) & 0xFFFFF000;
- return cpu_ver;
-}
-
-static inline u32 amazon_get_counter_resolution(void)
-{
- u32 res;
- __asm__ __volatile__(
- ".set push\n"
- ".set mips32r2\n"
- ".set noreorder\n"
- "rdhwr %0, $3\n"
- "ehb\n"
- ".set pop\n"
- : "=&r" (res)
- : /* no input */
- : "memory");
- instruction_hazard();
- return res;
-}
-
-void __init plat_time_init(void)
-{
- mips_hpt_frequency = amazon_get_cpu_hz() / amazon_get_counter_resolution();
- r4k_offset = mips_hpt_frequency / HZ;
- printk("mips_hpt_frequency:%d\n", mips_hpt_frequency);
- printk("r4k_offset: %08x(%d)\n", r4k_offset, r4k_offset);
-
- r4k_cur = (read_c0_count() + r4k_offset);
- write_c0_compare(r4k_cur);
-
- /* enable the timer in the PMU */
- amazon_writel(amazon_readl(AMAZON_PMU_PWDCR)| AMAZON_PMU_PWDCR_GPT|AMAZON_PMU_PWDCR_FPI, AMAZON_PMU_PWDCR);
-
- /* setup the GPTU for timer tick f_fpi == f_gptu*/
- amazon_writel(0x0100, AMAZON_GPTU_CLC);
- amazon_writel(0xffff, AMAZON_GPTU_CAPREL);
- amazon_writel(0x80C0, AMAZON_GPTU_T6CON);
-}
-
-void __init plat_mem_setup(void)
-{
- u32 chipid = 0;
- u32 part_no = 0;
-
- chipid = amazon_readl(AMAZON_MCD_CHIPID);
- part_no = AMAZON_MCD_CHIPID_PART_NUMBER_GET(chipid);
-
- if(part_no == AMAZON_CHIPID_YANGTSE){
- printk("Yangtse Version\n");
- } else if (part_no == AMAZON_CHIPID_STANDARD) {
- printk(SYSTEM_MODEL_NAME "\n");
- } else {
- printk("unknown version %8x\n",part_no);
- }
-
- amazon_reboot_setup();
-
- //stop reset TPE and DFE
- amazon_writel(0, AMAZON_RST_REQ);
- //clock
- amazon_writel(0x3fff, AMAZON_PMU_PWDCR);
- //reenable trace capability
- part_no = readl(AMAZON_BCU_ECON);
-
- ioport_resource.start = IOPORT_RESOURCE_START;
- ioport_resource.end = IOPORT_RESOURCE_END;
- iomem_resource.start = IOMEM_RESOURCE_START;
- iomem_resource.end = IOMEM_RESOURCE_END;
-}
-
-static void amazon_machine_restart(char *command)
-{
- local_irq_disable();
- amazon_writel(AMAZON_RST_ALL, AMAZON_RST_REQ);
- for (;;) ;
-}
-
-static void amazon_machine_halt(void)
-{
- printk(KERN_NOTICE "System halted.\n");
- local_irq_disable();
- for (;;) ;
-}
-
-static void amazon_machine_power_off(void)
-{
- printk(KERN_NOTICE "Please turn off the power now.\n");
- local_irq_disable();
- for (;;) ;
-}
-
-static void amazon_reboot_setup(void)
-{
- _machine_restart = amazon_machine_restart;
- _machine_halt = amazon_machine_halt;
- pm_power_off = amazon_machine_power_off;
-}
projects / openwrt / svn-archive / archive.git / blobdiff