initial merge of infineon code for amazon, pci is still broken a bit. a big thank you goes to infineon for providing info and reference code

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8137 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 216 insertions, 0 deletions

diff --git a/target/linux/amazon-2.6/files/arch/mips/amazon/setup.c b/target/linux/amazon-2.6/files/arch/mips/amazon/setup.c
new file mode 100644
index 0000000000..4cd3b9b97f
--- /dev/null
+++ b/target/linux/amazon-2.6/files/arch/mips/amazon/setup.c
@@ -0,0 +1,216 @@
+/*
+ *	 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_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_CGU_DIV) & 0x3)
+	{
+		case 1:
+			return clkCPU >> 1;
+		case 2:
+			return clkCPU >> 2;
+		default:
+			return clkCPU;
+		/* '11' is reserved */
+	}
+}
+
+/* get the CPU version number  - based on sysLib.c from VxWorks sources */
+/* 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_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);
+
+#if 0
+	/* to generate the first CPU timer interrupt */
+	write_c0_compare(read_c0_count() + amazon_get_cpu_hz()/(2*HZ));
+#endif
+
+	/* enable the timer in the PMU */
+	*(AMAZON_PMU_PWDCR) = (*(AMAZON_PMU_PWDCR))| AMAZON_PMU_PWDCR_GPT|AMAZON_PMU_PWDCR_FPI;
+	/* setup the GPTU for timer tick  f_fpi == f_gptu*/
+	*(AMAZON_GPTU_CLC) = 0x100;
+
+	*(AMAZON_GPTU_CAPREL) = 0xffff;
+	*(AMAZON_GPTU_T6CON) = 0x80C0;
+	//setup_irq(AMAZON_TIMER6_INT,&hrt_irqaction);
+
+#if 0
+#ifdef CONFIG_HIGH_RES_TIMERS
+	/* GPTU timer 6 */
+	int retval;
+	if ( hr_time_resolution > 200000000 || hr_time_resolution < 40) {
+		prom_printf("hr_time_resolution is out of range, HIGH_RES_TIMER is diabled.\n");
+		return;
+	}
+	
+	/* enable the timer in the PMU */
+        *(AMAZON_PMU_PWDCR) = (*(AMAZON_PMU_PWDCR))| AMAZON_PMU_PWDCR_GPT|AMAZON_PMU_PWDCR_FPI;
+	/* setup the GPTU for timer tick  f_fpi == f_gptu*/
+	*(AMAZON_GPTU_CLC) = 0x100;
+
+	*(AMAZON_GPTU_CAPREL) = 0xffff;
+	*(AMAZON_GPTU_T6CON) = 0x80C0;
+	
+	retval = setup_irq(AMAZON_TIMER6_INT,&hrt_irqaction);
+	if (retval){
+		prom_printf("reqeust_irq failed %d. HIGH_RES_TIMER is diabled\n",AMAZON_TIMER6_INT);		
+	}
+#endif //CONFIG_HIGH_RES_TIMERS		
+#endif
+}
+
+void __init plat_mem_setup(void)
+{	
+	u32 chipid = 0;
+	u32 part_no = 0;
+	
+	chipid = *(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_RST_REQ) = 0x0;
+	//clock
+	*(AMAZON_PMU_PWDCR) = 0x3fff;
+	//reenable trace capability
+	part_no = *(AMAZON_BCU_ECON);
+}
+
+static void amazon_machine_restart(char *command)
+{
+    local_irq_disable();
+    *AMAZON_RST_REQ = AMAZON_RST_ALL;
+    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;
+}