--- /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>
+
+extern void prom_printf(const char * fmt, ...);
+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 */
+ }
+}
+
+/* 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;
+}
+
+void amazon_time_init(void)
+{
+ mips_hpt_frequency = amazon_get_cpu_hz()/2;
+ printk("mips_hpt_frequency:%d\n", mips_hpt_frequency);
+}
+
+extern int hr_time_resolution;
+
+/* ISR GPTU Timer 6 for high resolution timer */
+static void amazon_timer6_interrupt(int irq, void *dev_id)
+{
+ timer_interrupt(AMAZON_TIMER6_INT, NULL);
+}
+
+static struct irqaction hrt_irqaction = {
+ .handler = amazon_timer6_interrupt,
+ .flags = SA_INTERRUPT,
+ .name = "hrt",
+};
+
+/*
+ * THe CPU counter for System timer, set to HZ
+ * GPTU Timer 6 for high resolution timer, set to hr_time_resolution
+ * Also misuse this routine to print out the CPU type and clock.
+ */
+void __init plat_timer_setup(struct irqaction *irq)
+{
+ /* cpu counter for timer interrupts */
+ setup_irq(MIPS_CPU_TIMER_IRQ, irq);
+
+ /* 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){
+ prom_printf("Yangtse Version\n");
+ } else if (part_no == AMAZON_CHIPID_STANDARD) {
+ prom_printf(SYSTEM_MODEL_NAME "\n");
+ } else {
+ prom_printf("unknown version %8x\n",part_no);
+ }
+
+ amazon_reboot_setup();
+ board_time_init = amazon_time_init;
+
+ //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);
+}
+
+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