cpu.c

/*
 * Copyright 2004,2007,2008 Freescale Semiconductor, Inc.
 * (C) Copyright 2002, 2003 Motorola Inc.
 * Xianghua Xiao (X.Xiao@motorola.com)
 *
 * (C) Copyright 2000
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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 <common.h>
#include <watchdog.h>
#include <command.h>
#include <asm/cache.h>

DECLARE_GLOBAL_DATA_PTR;

struct cpu_type {
	char name[15];
	u32 soc_ver;
};

#define CPU_TYPE_ENTRY(x) {#x, SVR_##x}

struct cpu_type cpu_type_list [] = {
	CPU_TYPE_ENTRY(8533),
	CPU_TYPE_ENTRY(8533_E),
	CPU_TYPE_ENTRY(8540),
	CPU_TYPE_ENTRY(8541),
	CPU_TYPE_ENTRY(8541_E),
	CPU_TYPE_ENTRY(8543),
	CPU_TYPE_ENTRY(8543_E),
	CPU_TYPE_ENTRY(8544),
	CPU_TYPE_ENTRY(8544_E),
	CPU_TYPE_ENTRY(8545),
	CPU_TYPE_ENTRY(8545_E),
	CPU_TYPE_ENTRY(8547_E),
	CPU_TYPE_ENTRY(8548),
	CPU_TYPE_ENTRY(8548_E),
	CPU_TYPE_ENTRY(8555),
	CPU_TYPE_ENTRY(8555_E),
	CPU_TYPE_ENTRY(8560),
	CPU_TYPE_ENTRY(8567),
	CPU_TYPE_ENTRY(8567_E),
	CPU_TYPE_ENTRY(8568),
	CPU_TYPE_ENTRY(8568_E),
	CPU_TYPE_ENTRY(8572),
	CPU_TYPE_ENTRY(8572_E),
};

int checkcpu (void)
{
	sys_info_t sysinfo;
	uint lcrr;		/* local bus clock ratio register */
	uint clkdiv;		/* clock divider portion of lcrr */
	uint pvr, svr;
	uint fam;
	uint ver;
	uint major, minor;
	int i;
	u32 ddr_ratio;
	volatile ccsr_gur_t *gur = (void *)(CFG_MPC85xx_GUTS_ADDR);

	svr = get_svr();
	ver = SVR_SOC_VER(svr);
	major = SVR_MAJ(svr);
	minor = SVR_MIN(svr);

	puts("CPU:   ");

	for (i = 0; i < ARRAY_SIZE(cpu_type_list); i++)
		if (cpu_type_list[i].soc_ver == ver) {
			puts(cpu_type_list[i].name);
			break;
		}

	if (i == ARRAY_SIZE(cpu_type_list))
		puts("Unknown");

	printf(", Version: %d.%d, (0x%08x)\n", major, minor, svr);

	pvr = get_pvr();
	fam = PVR_FAM(pvr);
	ver = PVR_VER(pvr);
	major = PVR_MAJ(pvr);
	minor = PVR_MIN(pvr);

	printf("Core:  ");
	switch (fam) {
	case PVR_FAM(PVR_85xx):
	    puts("E500");
	    break;
	default:
	    puts("Unknown");
	    break;
	}
	printf(", Version: %d.%d, (0x%08x)\n", major, minor, pvr);

	get_sys_info(&sysinfo);

	puts("Clock Configuration:\n");
	printf("       CPU:%4lu MHz, ", sysinfo.freqProcessor / 1000000);
	printf("CCB:%4lu MHz,\n", sysinfo.freqSystemBus / 1000000);

	ddr_ratio = ((gur->porpllsr) & 0x00003e00) >> 9;
	switch (ddr_ratio) {
	case 0x0:
		printf("       DDR:%4lu MHz (%lu MT/s data rate), ",
		sysinfo.freqDDRBus / 2000000, sysinfo.freqDDRBus / 1000000);
		break;
	case 0x7:
		printf("       DDR:%4lu MHz (%lu MT/s data rate) (Synchronous), ",
		sysinfo.freqDDRBus / 2000000, sysinfo.freqDDRBus / 1000000);
		break;
	default:
		printf("       DDR:%4lu MHz (%lu MT/s data rate) (Asynchronous), ",
		sysinfo.freqDDRBus / 2000000, sysinfo.freqDDRBus / 1000000);
		break;
	}

#if defined(CFG_LBC_LCRR)
	lcrr = CFG_LBC_LCRR;
#else
	{
	    volatile ccsr_lbc_t *lbc = (void *)(CFG_MPC85xx_LBC_ADDR);

	    lcrr = lbc->lcrr;
	}
#endif
	clkdiv = lcrr & 0x0f;
	if (clkdiv == 2 || clkdiv == 4 || clkdiv == 8) {
#if defined(CONFIG_MPC8548) || defined(CONFIG_MPC8544)
		/*
		 * Yes, the entire PQ38 family use the same
		 * bit-representation for twice the clock divider values.
		 */
		 clkdiv *= 2;
#endif
		printf("LBC:%4lu MHz\n",
		       sysinfo.freqSystemBus / 1000000 / clkdiv);
	} else {
		printf("LBC: unknown (lcrr: 0x%08x)\n", lcrr);
	}

#ifdef CONFIG_CPM2
	printf("CPM:  %lu Mhz\n", sysinfo.freqSystemBus / 1000000);
#endif

	puts("L1:    D-cache 32 kB enabled\n       I-cache 32 kB enabled\n");

	return 0;
}


/* ------------------------------------------------------------------------- */

int do_reset (cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[])
{
	uint pvr;
	uint ver;
	pvr = get_pvr();
	ver = PVR_VER(pvr);
	if (ver & 1){
	/* e500 v2 core has reset control register */
		volatile unsigned int * rstcr;
		rstcr = (volatile unsigned int *)(CFG_IMMR + 0xE00B0);
		*rstcr = 0x2;		/* HRESET_REQ */
	}else{
	/*
	 * Initiate hard reset in debug control register DBCR0
	 * Make sure MSR[DE] = 1
	 */
		unsigned long val, msr;

		msr = mfmsr ();
		msr |= MSR_DE;
		mtmsr (msr);

		val = mfspr(DBCR0);
		val |= 0x70000000;
		mtspr(DBCR0,val);
	}
	return 1;
}


/*
 * Get timebase clock frequency
 */
unsigned long get_tbclk (void)
{
	return (gd->bus_clk + 4UL)/8UL;
}


#if defined(CONFIG_WATCHDOG)
void
watchdog_reset(void)
{
	int re_enable = disable_interrupts();
	reset_85xx_watchdog();
	if (re_enable) enable_interrupts();
}

void
reset_85xx_watchdog(void)
{
	/*
	 * Clear TSR(WIS) bit by writing 1
	 */
	unsigned long val;
	val = mfspr(SPRN_TSR);
	val |= TSR_WIS;
	mtspr(SPRN_TSR, val);
}
#endif	/* CONFIG_WATCHDOG */

#if defined(CONFIG_DDR_ECC)
void dma_init(void) {
	volatile ccsr_dma_t *dma = (void *)(CFG_MPC85xx_DMA_ADDR);

	dma->satr0 = 0x02c40000;
	dma->datr0 = 0x02c40000;
	dma->sr0 = 0xfffffff; /* clear any errors */
	asm("sync; isync; msync");
	return;
}

uint dma_check(void) {
	volatile ccsr_dma_t *dma = (void *)(CFG_MPC85xx_DMA_ADDR);
	volatile uint status = dma->sr0;

	/* While the channel is busy, spin */
	while((status & 4) == 4) {
		status = dma->sr0;
	}

	/* clear MR0[CS] channel start bit */
	dma->mr0 &= 0x00000001;
	asm("sync;isync;msync");

	if (status != 0) {
		printf ("DMA Error: status = %x\n", status);
	}
	return status;
}

int dma_xfer(void *dest, uint count, void *src) {
	volatile ccsr_dma_t *dma = (void *)(CFG_MPC85xx_DMA_ADDR);

	dma->dar0 = (uint) dest;
	dma->sar0 = (uint) src;
	dma->bcr0 = count;
	dma->mr0 = 0xf000004;
	asm("sync;isync;msync");
	dma->mr0 = 0xf000005;
	asm("sync;isync;msync");
	return dma_check();
}
#endif