arch/arm/cpu/arm926ejs/orion5x/cpu.c

/*
 * Copyright (C) 2010 Albert ARIBAUD <albert.aribaud@free.fr>
 *
 * Based on original Kirkwood support which is
 * (C) Copyright 2009
 * Marvell Semiconductor <www.marvell.com>
 * Written-by: Prafulla Wadaskar <prafulla@marvell.com>
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301 USA
 */

#include <common.h>
#include <netdev.h>
#include <asm/cache.h>
#include <u-boot/md5.h>
#include <asm/arch/orion5x.h>
#include <hush.h>

#define BUFLEN	16

void reset_cpu(unsigned long ignored)
{
	struct orion5x_cpu_registers *cpureg =
	    (struct orion5x_cpu_registers *)ORION5X_CPU_REG_BASE;

	writel(readl(&cpureg->rstoutn_mask) | (1 << 2),
		&cpureg->rstoutn_mask);
	writel(readl(&cpureg->sys_soft_rst) | 1,
		&cpureg->sys_soft_rst);
	while (1)
		;
}

/*
 * Window Size
 * Used with the Base register to set the address window size and location.
 * Must be programmed from LSB to MSB as sequence of ones followed by
 * sequence of zeros. The number of ones specifies the size of the window in
 * 64 KByte granularity (e.g., a value of 0x00FF specifies 256 = 16 MByte).
 * NOTE: A value of 0x0 specifies 64-KByte size.
 */
unsigned int orion5x_winctrl_calcsize(unsigned int sizeval)
{
	int i;
	unsigned int j = 0;
	u32 val = sizeval >> 1;

	for (i = 0; val > 0x10000; i++) {
		j |= (1 << i);
		val = val >> 1;
	}
	return 0x0000ffff & j;
}

/*
 * orion5x_config_adr_windows - Configure address Windows
 *
 * There are 8 address windows supported by Orion5x Soc to addess different
 * devices. Each window can be configured for size, BAR and remap addr
 * Below configuration is standard for most of the cases
 *
 * If remap function not used, remap_lo must be set as base
 *
 * Reference Documentation:
 * Mbus-L to Mbus Bridge Registers Configuration.
 * (Sec 25.1 and 25.3 of Datasheet)
 */
int orion5x_config_adr_windows(void)
{
	struct orion5x_win_registers *winregs =
		(struct orion5x_win_registers *)ORION5X_CPU_WIN_BASE;

	/* Window 0: PCIE MEM address space */
	writel(ORION5X_CPU_WIN_CTRL_DATA(ORION5X_DEFSZ_PCIE_MEM,
		ORION5X_TARGET_PCIE, ORION5X_ATTR_PCIE_MEM,
		ORION5X_WIN_ENABLE), &winregs[0].ctrl);
	writel(ORION5X_DEFADR_PCIE_MEM, &winregs[0].base);
	writel(ORION5X_DEFADR_PCIE_MEM_REMAP_LO, &winregs[0].remap_lo);
	writel(ORION5X_DEFADR_PCIE_MEM_REMAP_HI, &winregs[0].remap_hi);

	/* Window 1: PCIE IO address space */
	writel(ORION5X_CPU_WIN_CTRL_DATA(ORION5X_DEFSZ_PCIE_IO,
		ORION5X_TARGET_PCIE, ORION5X_ATTR_PCIE_IO,
		ORION5X_WIN_ENABLE), &winregs[1].ctrl);
	writel(ORION5X_DEFADR_PCIE_IO, &winregs[1].base);
	writel(ORION5X_DEFADR_PCIE_IO_REMAP_LO, &winregs[1].remap_lo);
	writel(ORION5X_DEFADR_PCIE_IO_REMAP_HI, &winregs[1].remap_hi);

	/* Window 2: PCI MEM address space */
	writel(ORION5X_CPU_WIN_CTRL_DATA(ORION5X_DEFSZ_PCI_MEM,
		ORION5X_TARGET_PCI, ORION5X_ATTR_PCI_MEM,
		ORION5X_WIN_ENABLE), &winregs[2].ctrl);
	writel(ORION5X_DEFADR_PCI_MEM, &winregs[2].base);

	/* Window 3: PCI IO address space */
	writel(ORION5X_CPU_WIN_CTRL_DATA(ORION5X_DEFSZ_PCI_IO,
		ORION5X_TARGET_PCI, ORION5X_ATTR_PCI_IO,
		ORION5X_WIN_ENABLE), &winregs[3].ctrl);
	writel(ORION5X_DEFADR_PCI_IO, &winregs[3].base);

	/* Window 4: DEV_CS0 address space */
	writel(ORION5X_CPU_WIN_CTRL_DATA(ORION5X_DEFSZ_DEV_CS0,
		ORION5X_TARGET_DEVICE, ORION5X_ATTR_DEV_CS0,
		ORION5X_WIN_ENABLE), &winregs[4].ctrl);
	writel(ORION5X_DEFADR_DEV_CS0, &winregs[4].base);

	/* Window 5: DEV_CS1 address space */
	writel(ORION5X_CPU_WIN_CTRL_DATA(ORION5X_DEFSZ_DEV_CS1,
		ORION5X_TARGET_DEVICE, ORION5X_ATTR_DEV_CS1,
		ORION5X_WIN_ENABLE), &winregs[5].ctrl);
	writel(ORION5X_DEFADR_DEV_CS1, &winregs[5].base);

	/* Window 6: DEV_CS2 address space */
	writel(ORION5X_CPU_WIN_CTRL_DATA(ORION5X_DEFSZ_DEV_CS2,
		ORION5X_TARGET_DEVICE, ORION5X_ATTR_DEV_CS2,
		ORION5X_WIN_ENABLE), &winregs[6].ctrl);
	writel(ORION5X_DEFADR_DEV_CS2, &winregs[6].base);

	/* Window 7: BOOT Memory address space */
	writel(ORION5X_CPU_WIN_CTRL_DATA(ORION5X_DEFSZ_BOOTROM,
		ORION5X_TARGET_DEVICE, ORION5X_ATTR_BOOTROM,
		ORION5X_WIN_ENABLE), &winregs[7].ctrl);
	writel(ORION5X_DEFADR_BOOTROM, &winregs[7].base);

	return 0;
}

/*
 * Orion5x identification is done through PCIE space.
 */

u32 orion5x_device_id(void)
{
	return readl(PCIE_DEV_ID_OFF) >> 16;
}

u32 orion5x_device_rev(void)
{
	return readl(PCIE_DEV_REV_OFF) & 0xff;
}

#if defined(CONFIG_DISPLAY_CPUINFO)

/* Display device and revision IDs.
 * This function must cover all known device/revision
 * combinations, not only the one for which u-boot is
 * compiled; this way, one can identify actual HW in
 * case of a mismatch.
 */
int print_cpuinfo(void)
{
	char dev_str[] = "0x0000";
	char rev_str[] = "0x00";
	char *dev_name = NULL;
	char *rev_name = NULL;

	u32 dev = orion5x_device_id();
	u32 rev = orion5x_device_rev();

	if (dev == MV88F5181_DEV_ID) {
		dev_name = "MV88F5181";
		if (rev == MV88F5181_REV_B1)
			rev_name = "B1";
		else if (rev == MV88F5181L_REV_A1) {
			dev_name = "MV88F5181L";
			rev_name = "A1";
		} else if (rev == MV88F5181L_REV_A0) {
			dev_name = "MV88F5181L";
			rev_name = "A0";
		}
	} else if (dev == MV88F5182_DEV_ID) {
		dev_name = "MV88F5182";
		if (rev == MV88F5182_REV_A2)
			rev_name = "A2";
	} else if (dev == MV88F5281_DEV_ID) {
		dev_name = "MV88F5281";
		if (rev == MV88F5281_REV_D2)
			rev_name = "D2";
		else if (rev == MV88F5281_REV_D1)
			rev_name = "D1";
		else if (rev == MV88F5281_REV_D0)
			rev_name = "D0";
	} else if (dev == MV88F6183_DEV_ID) {
		dev_name = "MV88F6183";
		if (rev == MV88F6183_REV_B0)
			rev_name = "B0";
	}
	if (dev_name == NULL) {
		sprintf(dev_str, "0x%04x", dev);
		dev_name = dev_str;
	}
	if (rev_name == NULL) {
		sprintf(rev_str, "0x%02x", rev);
		rev_name = rev_str;
	}

	printf("SoC:   Orion5x %s-%s\n", dev_name, rev_name);

	return 0;
}
#endif /* CONFIG_DISPLAY_CPUINFO */

#ifdef CONFIG_ARCH_CPU_INIT
int arch_cpu_init(void)
{
	/* Enable and invalidate L2 cache in write through mode */
	invalidate_l2_cache();

	orion5x_config_adr_windows();

	return 0;
}
#endif /* CONFIG_ARCH_CPU_INIT */

/*
 * SOC specific misc init
 */
#if defined(CONFIG_ARCH_MISC_INIT)
int arch_misc_init(void)
{
	u32 temp;

	/*CPU streaming & write allocate */
	temp = readfr_extra_feature_reg();
	temp &= ~(1 << 28);	/* disable wr alloc */
	writefr_extra_feature_reg(temp);

	temp = readfr_extra_feature_reg();
	temp &= ~(1 << 29);	/* streaming disabled */
	writefr_extra_feature_reg(temp);

	/* L2Cache settings */
	temp = readfr_extra_feature_reg();
	/* Disable L2C pre fetch - Set bit 24 */
	temp |= (1 << 24);
	/* enable L2C - Set bit 22 */
	temp |= (1 << 22);
	writefr_extra_feature_reg(temp);

	icache_enable();
	/* Change reset vector to address 0x0 */
	temp = get_cr();
	set_cr(temp & ~CR_V);

	/* Set CPIOs and MPPs - values provided by board
	   include file */
	writel(ORION5X_MPP0_7, ORION5X_MPP_BASE+0x00);
	writel(ORION5X_MPP8_15, ORION5X_MPP_BASE+0x04);
	writel(ORION5X_MPP16_23, ORION5X_MPP_BASE+0x50);
	writel(ORION5X_GPIO_OUT_ENABLE, ORION5X_GPIO_BASE+0x04);

	return 0;
}
#endif /* CONFIG_ARCH_MISC_INIT */