arch/arm/mach-mvebu/cpu.c - platform/external/u-boot - Gitiles

 /*
  * Copyright (C) 2014-2015 Stefan Roese <sr@denx.de>
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */

 #include <common.h>
 #include <ahci.h>
 #include <linux/mbus.h>
 #include <asm/io.h>
 #include <asm/pl310.h>
 #include <asm/arch/cpu.h>
 #include <asm/arch/soc.h>
 #include <sdhci.h>

 #define DDR_BASE_CS_OFF(n)	(0x0000 + ((n) << 3))
 #define DDR_SIZE_CS_OFF(n)	(0x0004 + ((n) << 3))

 static struct mbus_win windows[] = {
 	/* SPI */
 	{ MBUS_SPI_BASE, MBUS_SPI_SIZE,
 	  CPU_TARGET_DEVICEBUS_BOOTROM_SPI, CPU_ATTR_SPIFLASH },

 	/* NOR */
 	{ MBUS_BOOTROM_BASE, MBUS_BOOTROM_SIZE,
 	  CPU_TARGET_DEVICEBUS_BOOTROM_SPI, CPU_ATTR_BOOTROM },
 };

 void lowlevel_init(void)
 {
 	/*
 	 * Dummy implementation, we only need LOWLEVEL_INIT
 	 * on Armada to configure CP15 in start.S / cpu_init_cp15()
 	 */
 }

 void reset_cpu(unsigned long ignored)
 {
 	struct mvebu_system_registers *reg =
 		(struct mvebu_system_registers *)MVEBU_SYSTEM_REG_BASE;

 	writel(readl(&reg->rstoutn_mask) | 1, &reg->rstoutn_mask);
 	writel(readl(&reg->sys_soft_rst) | 1, &reg->sys_soft_rst);
 	while (1)
 		;
 }

 int mvebu_soc_family(void)
 {
 	u16 devid = (readl(MVEBU_REG_PCIE_DEVID) >> 16) & 0xffff;

 	if ((devid == SOC_MV78260_ID) || (devid == SOC_MV78460_ID))
 		return MVEBU_SOC_AXP;

 	if (devid == SOC_88F6810_ID || devid == SOC_88F6820_ID ||
 	    devid == SOC_88F6828_ID)
 		return MVEBU_SOC_A38X;

 	return MVEBU_SOC_UNKNOWN;
 }

 #if defined(CONFIG_DISPLAY_CPUINFO)

 #if defined(CONFIG_ARMADA_38X)
 /* SAR values for Armada 38x */
 #define CONFIG_SAR_REG		(MVEBU_REGISTER(0x18600))
 #define SAR_CPU_FREQ_OFFS	10
 #define SAR_CPU_FREQ_MASK	(0x1f << SAR_CPU_FREQ_OFFS)

 struct sar_freq_modes sar_freq_tab[] = {
 	{  0x0,  0x0,  666, 333, 333 },
 	{  0x2,  0x0,  800, 400, 400 },
 	{  0x4,  0x0, 1066, 533, 533 },
 	{  0x6,  0x0, 1200, 600, 600 },
 	{  0x8,  0x0, 1332, 666, 666 },
 	{  0xc,  0x0, 1600, 800, 800 },
 	{ 0xff, 0xff,    0,   0,   0 }	/* 0xff marks end of array */
 };
 #else
 /* SAR values for Armada XP */
 #define CONFIG_SAR_REG		(MVEBU_REGISTER(0x18230))
 #define CONFIG_SAR2_REG		(MVEBU_REGISTER(0x18234))
 #define SAR_CPU_FREQ_OFFS	21
 #define SAR_CPU_FREQ_MASK	(0x7 << SAR_CPU_FREQ_OFFS)
 #define SAR_FFC_FREQ_OFFS	24
 #define SAR_FFC_FREQ_MASK	(0xf << SAR_FFC_FREQ_OFFS)
 #define SAR2_CPU_FREQ_OFFS	20
 #define SAR2_CPU_FREQ_MASK	(0x1 << SAR2_CPU_FREQ_OFFS)

 struct sar_freq_modes sar_freq_tab[] = {
 	{  0xa,  0x5,  800, 400, 400 },
 	{  0x1,  0x5, 1066, 533, 533 },
 	{  0x2,  0x5, 1200, 600, 600 },
 	{  0x2,  0x9, 1200, 600, 400 },
 	{  0x3,  0x5, 1333, 667, 667 },
 	{  0x4,  0x5, 1500, 750, 750 },
 	{  0x4,  0x9, 1500, 750, 500 },
 	{  0xb,  0x9, 1600, 800, 533 },
 	{  0xb,  0xa, 1600, 800, 640 },
 	{  0xb,  0x5, 1600, 800, 800 },
 	{ 0xff, 0xff,    0,   0,   0 }	/* 0xff marks end of array */
 };
 #endif

 void get_sar_freq(struct sar_freq_modes *sar_freq)
 {
 	u32 val;
 	u32 freq;
 	int i;

 	val = readl(CONFIG_SAR_REG);	/* SAR - Sample At Reset */
 	freq = (val & SAR_CPU_FREQ_MASK) >> SAR_CPU_FREQ_OFFS;
 #if !defined(CONFIG_ARMADA_38X)
 	/*
 	 * Shift CPU0 clock frequency select bit from SAR2 register
 	 * into correct position
 	 */
 	freq |= ((readl(CONFIG_SAR2_REG) & SAR2_CPU_FREQ_MASK)
 		 >> SAR2_CPU_FREQ_OFFS) << 3;
 #endif
 	for (i = 0; sar_freq_tab[i].val != 0xff; i++) {
 		if (sar_freq_tab[i].val == freq) {
 #if defined(CONFIG_ARMADA_38X)
 			*sar_freq = sar_freq_tab[i];
 			return;
 #else
 			int k;
 			u8 ffc;

 			ffc = (val & SAR_FFC_FREQ_MASK) >>
 				SAR_FFC_FREQ_OFFS;
 			for (k = i; sar_freq_tab[k].ffc != 0xff; k++) {
 				if (sar_freq_tab[k].ffc == ffc) {
 					*sar_freq = sar_freq_tab[k];
 					return;
 				}
 			}
 			i = k;
 #endif
 		}
 	}

 	/* SAR value not found, return 0 for frequencies */
 	*sar_freq = sar_freq_tab[i - 1];
 }

 int print_cpuinfo(void)
 {
 	u16 devid = (readl(MVEBU_REG_PCIE_DEVID) >> 16) & 0xffff;
 	u8 revid = readl(MVEBU_REG_PCIE_REVID) & 0xff;
 	struct sar_freq_modes sar_freq;

 	puts("SoC:   ");

 	switch (devid) {
 	case SOC_MV78260_ID:
 		puts("MV78260-");
 		break;
 	case SOC_MV78460_ID:
 		puts("MV78460-");
 		break;
 	case SOC_88F6810_ID:
 		puts("MV88F6810-");
 		break;
 	case SOC_88F6820_ID:
 		puts("MV88F6820-");
 		break;
 	case SOC_88F6828_ID:
 		puts("MV88F6828-");
 		break;
 	default:
 		puts("Unknown-");
 		break;
 	}

 	if (mvebu_soc_family() == MVEBU_SOC_AXP) {
 		switch (revid) {
 		case 1:
 			puts("A0");
 			break;
 		case 2:
 			puts("B0");
 			break;
 		default:
 			printf("?? (%x)", revid);
 			break;
 		}
 	}

 	if (mvebu_soc_family() == MVEBU_SOC_A38X) {
 		switch (revid) {
 		case MV_88F68XX_Z1_ID:
 			puts("Z1");
 			break;
 		case MV_88F68XX_A0_ID:
 			puts("A0");
 			break;
 		default:
 			printf("?? (%x)", revid);
 			break;
 		}
 	}

 	get_sar_freq(&sar_freq);
 	printf(" at %d MHz\n", sar_freq.p_clk);

 	return 0;
 }
 #endif /* CONFIG_DISPLAY_CPUINFO */

 /*
  * This function initialize Controller DRAM Fastpath windows.
  * It takes the CS size information from the 0x1500 scratch registers
  * and sets the correct windows sizes and base addresses accordingly.
  *
  * These values are set in the scratch registers by the Marvell
  * DDR3 training code, which is executed by the BootROM before the
  * main payload (U-Boot) is executed. This training code is currently
  * only available in the Marvell U-Boot version. It needs to be
  * ported to mainline U-Boot SPL at some point.
  */
 static void update_sdram_window_sizes(void)
 {
 	u64 base = 0;
 	u32 size, temp;
 	int i;

 	for (i = 0; i < SDRAM_MAX_CS; i++) {
 		size = readl((MVEBU_SDRAM_SCRATCH + (i * 8))) & SDRAM_ADDR_MASK;
 		if (size != 0) {
 			size |= ~(SDRAM_ADDR_MASK);

 			/* Set Base Address */
 			temp = (base & 0xFF000000ll) | ((base >> 32) & 0xF);
 			writel(temp, MVEBU_SDRAM_BASE + DDR_BASE_CS_OFF(i));

 			/*
 			 * Check if out of max window size and resize
 			 * the window
 			 */
 			temp = (readl(MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i)) &
 				~(SDRAM_ADDR_MASK)) | 1;
 			temp |= (size & SDRAM_ADDR_MASK);
 			writel(temp, MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i));

 			base += ((u64)size + 1);
 		} else {
 			/*
 			 * Disable window if not used, otherwise this
 			 * leads to overlapping enabled windows with
 			 * pretty strange results
 			 */
 			clrbits_le32(MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i), 1);
 		}
 	}
 }

 void mmu_disable(void)
 {
 	asm volatile(
 		"mrc p15, 0, r0, c1, c0, 0\n"
 		"bic r0, #1\n"
 		"mcr p15, 0, r0, c1, c0, 0\n");
 }

 #ifdef CONFIG_ARCH_CPU_INIT
 static void set_cbar(u32 addr)
 {
 	asm("mcr p15, 4, %0, c15, c0" : : "r" (addr));
 }

 #define MV_USB_PHY_BASE			(MVEBU_AXP_USB_BASE + 0x800)
 #define MV_USB_PHY_PLL_REG(reg)		(MV_USB_PHY_BASE | (((reg) & 0xF) << 2))
 #define MV_USB_X3_BASE(addr)		(MVEBU_AXP_USB_BASE | BIT(11) | \
 					 (((addr) & 0xF) << 6))
 #define MV_USB_X3_PHY_CHANNEL(dev, reg)	(MV_USB_X3_BASE((dev) + 1) |	\
 					 (((reg) & 0xF) << 2))

 static void setup_usb_phys(void)
 {
 	int dev;

 	/*
 	 * USB PLL init
 	 */

 	/* Setup PLL frequency */
 	/* USB REF frequency = 25 MHz */
 	clrsetbits_le32(MV_USB_PHY_PLL_REG(1), 0x3ff, 0x605);

 	/* Power up PLL and PHY channel */
 	setbits_le32(MV_USB_PHY_PLL_REG(2), BIT(9));

 	/* Assert VCOCAL_START */
 	setbits_le32(MV_USB_PHY_PLL_REG(1), BIT(21));

 	mdelay(1);

 	/*
 	 * USB PHY init (change from defaults) specific for 40nm (78X30 78X60)
 	 */

 	for (dev = 0; dev < 3; dev++) {
 		setbits_le32(MV_USB_X3_PHY_CHANNEL(dev, 3), BIT(15));

 		/* Assert REG_RCAL_START in channel REG 1 */
 		setbits_le32(MV_USB_X3_PHY_CHANNEL(dev, 1), BIT(12));
 		udelay(40);
 		clrbits_le32(MV_USB_X3_PHY_CHANNEL(dev, 1), BIT(12));
 	}
 }

 /*
  * This function is not called from the SPL U-Boot version
  */
 int arch_cpu_init(void)
 {
 	struct pl310_regs *const pl310 =
 		(struct pl310_regs *)CONFIG_SYS_PL310_BASE;

 	/*
 	 * Only with disabled MMU its possible to switch the base
 	 * register address on Armada 38x. Without this the SDRAM
 	 * located at >= 0x4000.0000 is also not accessible, as its
 	 * still locked to cache.
 	 */
 	mmu_disable();

 	/* Linux expects the internal registers to be at 0xf1000000 */
 	writel(SOC_REGS_PHY_BASE, INTREG_BASE_ADDR_REG);
 	set_cbar(SOC_REGS_PHY_BASE + 0xC000);

 	/*
 	 * From this stage on, the SoC detection is working. As we have
 	 * configured the internal register base to the value used
 	 * in the macros / defines in the U-Boot header (soc.h).
 	 */

 	if (mvebu_soc_family() == MVEBU_SOC_A38X) {
 		/*
 		 * To fully release / unlock this area from cache, we need
 		 * to flush all caches and disable the L2 cache.
 		 */
 		icache_disable();
 		dcache_disable();
 		clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
 	}

 	/*
 	 * We need to call mvebu_mbus_probe() before calling
 	 * update_sdram_window_sizes() as it disables all previously
 	 * configured mbus windows and then configures them as
 	 * required for U-Boot. Calling update_sdram_window_sizes()
 	 * without this configuration will not work, as the internal
 	 * registers can't be accessed reliably because of potenial
 	 * double mapping.
 	 * After updating the SDRAM access windows we need to call
 	 * mvebu_mbus_probe() again, as this now correctly configures
 	 * the SDRAM areas that are later used by the MVEBU drivers
 	 * (e.g. USB, NETA).
 	 */

 	/*
 	 * First disable all windows
 	 */
 	mvebu_mbus_probe(NULL, 0);

 	if (mvebu_soc_family() == MVEBU_SOC_AXP) {
 		/*
 		 * Now the SDRAM access windows can be reconfigured using
 		 * the information in the SDRAM scratch pad registers
 		 */
 		update_sdram_window_sizes();
 	}

 	/*
 	 * Finally the mbus windows can be configured with the
 	 * updated SDRAM sizes
 	 */
 	mvebu_mbus_probe(windows, ARRAY_SIZE(windows));

 	if (mvebu_soc_family() == MVEBU_SOC_AXP) {
 		/* Enable GBE0, GBE1, LCD and NFC PUP */
 		clrsetbits_le32(ARMADA_XP_PUP_ENABLE, 0,
 				GE0_PUP_EN | GE1_PUP_EN | LCD_PUP_EN |
 				NAND_PUP_EN | SPI_PUP_EN);

 		/* Configure USB PLL and PHYs on AXP */
 		setup_usb_phys();
 	}

 	/* Enable NAND and NAND arbiter */
 	clrsetbits_le32(MVEBU_SOC_DEV_MUX_REG, 0, NAND_EN | NAND_ARBITER_EN);

 	/* Disable MBUS error propagation */
 	clrsetbits_le32(SOC_COHERENCY_FABRIC_CTRL_REG, MBUS_ERR_PROP_EN, 0);

 	return 0;
 }
 #endif /* CONFIG_ARCH_CPU_INIT */

 u32 mvebu_get_nand_clock(void)
 {
 	return CONFIG_SYS_MVEBU_PLL_CLOCK /
 		((readl(MVEBU_CORE_DIV_CLK_CTRL(1)) &
 		  NAND_ECC_DIVCKL_RATIO_MASK) >> NAND_ECC_DIVCKL_RATIO_OFFS);
 }

 /*
  * SOC specific misc init
  */
 #if defined(CONFIG_ARCH_MISC_INIT)
 int arch_misc_init(void)
 {
 	/* Nothing yet, perhaps we need something here later */
 	return 0;
 }
 #endif /* CONFIG_ARCH_MISC_INIT */

 #ifdef CONFIG_MV_SDHCI
 int board_mmc_init(bd_t *bis)
 {
 	mv_sdh_init(MVEBU_SDIO_BASE, 0, 0,
 		    SDHCI_QUIRK_32BIT_DMA_ADDR | SDHCI_QUIRK_WAIT_SEND_CMD);

 	return 0;
 }
 #endif

 #ifdef CONFIG_SCSI_AHCI_PLAT
 #define AHCI_VENDOR_SPECIFIC_0_ADDR	0xa0
 #define AHCI_VENDOR_SPECIFIC_0_DATA	0xa4

 #define AHCI_WINDOW_CTRL(win)		(0x60 + ((win) << 4))
 #define AHCI_WINDOW_BASE(win)		(0x64 + ((win) << 4))
 #define AHCI_WINDOW_SIZE(win)		(0x68 + ((win) << 4))

 static void ahci_mvebu_mbus_config(void __iomem *base)
 {
 	const struct mbus_dram_target_info *dram;
 	int i;

 	dram = mvebu_mbus_dram_info();

 	for (i = 0; i < 4; i++) {
 		writel(0, base + AHCI_WINDOW_CTRL(i));
 		writel(0, base + AHCI_WINDOW_BASE(i));
 		writel(0, base + AHCI_WINDOW_SIZE(i));
 	}

 	for (i = 0; i < dram->num_cs; i++) {
 		const struct mbus_dram_window *cs = dram->cs + i;

 		writel((cs->mbus_attr << 8) |
 		       (dram->mbus_dram_target_id << 4) | 1,
 		       base + AHCI_WINDOW_CTRL(i));
 		writel(cs->base >> 16, base + AHCI_WINDOW_BASE(i));
 		writel(((cs->size - 1) & 0xffff0000),
 		       base + AHCI_WINDOW_SIZE(i));
 	}
 }

 static void ahci_mvebu_regret_option(void __iomem *base)
 {
 	/*
 	 * Enable the regret bit to allow the SATA unit to regret a
 	 * request that didn't receive an acknowlegde and avoid a
 	 * deadlock
 	 */
 	writel(0x4, base + AHCI_VENDOR_SPECIFIC_0_ADDR);
 	writel(0x80, base + AHCI_VENDOR_SPECIFIC_0_DATA);
 }

 void scsi_init(void)
 {
 	printf("MVEBU SATA INIT\n");
 	ahci_mvebu_mbus_config((void __iomem *)MVEBU_SATA0_BASE);
 	ahci_mvebu_regret_option((void __iomem *)MVEBU_SATA0_BASE);
 	ahci_init((void __iomem *)MVEBU_SATA0_BASE);
 }
 #endif

 void enable_caches(void)
 {
 	/* Avoid problem with e.g. neta ethernet driver */
 	invalidate_dcache_all();

 	/* Enable D-cache. I-cache is already enabled in start.S */
 	dcache_enable();
 }

 void v7_outer_cache_enable(void)
 {
 	if (mvebu_soc_family() == MVEBU_SOC_AXP) {
 		struct pl310_regs *const pl310 =
 			(struct pl310_regs *)CONFIG_SYS_PL310_BASE;
 		u32 u;

 		/* The L2 cache is already disabled at this point */

 		/*
 		 * For Aurora cache in no outer mode, enable via the CP15
 		 * coprocessor broadcasting of cache commands to L2.
 		 */
 		asm volatile("mrc p15, 1, %0, c15, c2, 0" : "=r" (u));
 		u |= BIT(8);		/* Set the FW bit */
 		asm volatile("mcr p15, 1, %0, c15, c2, 0" : : "r" (u));

 		isb();

 		/* Enable the L2 cache */
 		setbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
 	}
 }

 void v7_outer_cache_disable(void)
 {
 	struct pl310_regs *const pl310 =
 		(struct pl310_regs *)CONFIG_SYS_PL310_BASE;

 	clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
 }
	/*
	* Copyright (C) 2014-2015 Stefan Roese <sr@denx.de>
	*
	* SPDX-License-Identifier: GPL-2.0+
	*/

	#include <common.h>
	#include <ahci.h>
	#include <linux/mbus.h>
	#include <asm/io.h>
	#include <asm/pl310.h>
	#include <asm/arch/cpu.h>
	#include <asm/arch/soc.h>
	#include <sdhci.h>

	#define DDR_BASE_CS_OFF(n) (0x0000 + ((n) << 3))
	#define DDR_SIZE_CS_OFF(n) (0x0004 + ((n) << 3))

	static struct mbus_win windows[] = {
	/* SPI */
	{ MBUS_SPI_BASE, MBUS_SPI_SIZE,
	CPU_TARGET_DEVICEBUS_BOOTROM_SPI, CPU_ATTR_SPIFLASH },

	/* NOR */
	{ MBUS_BOOTROM_BASE, MBUS_BOOTROM_SIZE,
	CPU_TARGET_DEVICEBUS_BOOTROM_SPI, CPU_ATTR_BOOTROM },
	};

	void lowlevel_init(void)
	{
	/*
	* Dummy implementation, we only need LOWLEVEL_INIT
	* on Armada to configure CP15 in start.S / cpu_init_cp15()
	*/
	}

	void reset_cpu(unsigned long ignored)
	{
	struct mvebu_system_registers *reg =
	(struct mvebu_system_registers *)MVEBU_SYSTEM_REG_BASE;

	writel(readl(&reg->rstoutn_mask) \| 1, &reg->rstoutn_mask);
	writel(readl(&reg->sys_soft_rst) \| 1, &reg->sys_soft_rst);
	while (1)
	;
	}

	int mvebu_soc_family(void)
	{
	u16 devid = (readl(MVEBU_REG_PCIE_DEVID) >> 16) & 0xffff;

	if ((devid == SOC_MV78260_ID) \|\| (devid == SOC_MV78460_ID))
	return MVEBU_SOC_AXP;

	if (devid == SOC_88F6810_ID \|\| devid == SOC_88F6820_ID \|\|
	devid == SOC_88F6828_ID)
	return MVEBU_SOC_A38X;

	return MVEBU_SOC_UNKNOWN;
	}

	#if defined(CONFIG_DISPLAY_CPUINFO)

	#if defined(CONFIG_ARMADA_38X)
	/* SAR values for Armada 38x */
	#define CONFIG_SAR_REG (MVEBU_REGISTER(0x18600))
	#define SAR_CPU_FREQ_OFFS 10
	#define SAR_CPU_FREQ_MASK (0x1f << SAR_CPU_FREQ_OFFS)

	struct sar_freq_modes sar_freq_tab[] = {
	{ 0x0, 0x0, 666, 333, 333 },
	{ 0x2, 0x0, 800, 400, 400 },
	{ 0x4, 0x0, 1066, 533, 533 },
	{ 0x6, 0x0, 1200, 600, 600 },
	{ 0x8, 0x0, 1332, 666, 666 },
	{ 0xc, 0x0, 1600, 800, 800 },
	{ 0xff, 0xff, 0, 0, 0 } /* 0xff marks end of array */
	};
	#else
	/* SAR values for Armada XP */
	#define CONFIG_SAR_REG (MVEBU_REGISTER(0x18230))
	#define CONFIG_SAR2_REG (MVEBU_REGISTER(0x18234))
	#define SAR_CPU_FREQ_OFFS 21
	#define SAR_CPU_FREQ_MASK (0x7 << SAR_CPU_FREQ_OFFS)
	#define SAR_FFC_FREQ_OFFS 24
	#define SAR_FFC_FREQ_MASK (0xf << SAR_FFC_FREQ_OFFS)
	#define SAR2_CPU_FREQ_OFFS 20
	#define SAR2_CPU_FREQ_MASK (0x1 << SAR2_CPU_FREQ_OFFS)

	struct sar_freq_modes sar_freq_tab[] = {
	{ 0xa, 0x5, 800, 400, 400 },
	{ 0x1, 0x5, 1066, 533, 533 },
	{ 0x2, 0x5, 1200, 600, 600 },
	{ 0x2, 0x9, 1200, 600, 400 },
	{ 0x3, 0x5, 1333, 667, 667 },
	{ 0x4, 0x5, 1500, 750, 750 },
	{ 0x4, 0x9, 1500, 750, 500 },
	{ 0xb, 0x9, 1600, 800, 533 },
	{ 0xb, 0xa, 1600, 800, 640 },
	{ 0xb, 0x5, 1600, 800, 800 },
	{ 0xff, 0xff, 0, 0, 0 } /* 0xff marks end of array */
	};
	#endif

	void get_sar_freq(struct sar_freq_modes *sar_freq)
	{
	u32 val;
	u32 freq;
	int i;

	val = readl(CONFIG_SAR_REG); /* SAR - Sample At Reset */
	freq = (val & SAR_CPU_FREQ_MASK) >> SAR_CPU_FREQ_OFFS;
	#if !defined(CONFIG_ARMADA_38X)
	/*
	* Shift CPU0 clock frequency select bit from SAR2 register
	* into correct position
	*/
	freq \|= ((readl(CONFIG_SAR2_REG) & SAR2_CPU_FREQ_MASK)
	>> SAR2_CPU_FREQ_OFFS) << 3;
	#endif
	for (i = 0; sar_freq_tab[i].val != 0xff; i++) {
	if (sar_freq_tab[i].val == freq) {
	#if defined(CONFIG_ARMADA_38X)
	*sar_freq = sar_freq_tab[i];
	return;
	#else
	int k;
	u8 ffc;

	ffc = (val & SAR_FFC_FREQ_MASK) >>
	SAR_FFC_FREQ_OFFS;
	for (k = i; sar_freq_tab[k].ffc != 0xff; k++) {
	if (sar_freq_tab[k].ffc == ffc) {
	*sar_freq = sar_freq_tab[k];
	return;
	}
	}
	i = k;
	#endif
	}
	}

	/* SAR value not found, return 0 for frequencies */
	*sar_freq = sar_freq_tab[i - 1];
	}

	int print_cpuinfo(void)
	{
	u16 devid = (readl(MVEBU_REG_PCIE_DEVID) >> 16) & 0xffff;
	u8 revid = readl(MVEBU_REG_PCIE_REVID) & 0xff;
	struct sar_freq_modes sar_freq;

	puts("SoC: ");

	switch (devid) {
	case SOC_MV78260_ID:
	puts("MV78260-");
	break;
	case SOC_MV78460_ID:
	puts("MV78460-");
	break;
	case SOC_88F6810_ID:
	puts("MV88F6810-");
	break;
	case SOC_88F6820_ID:
	puts("MV88F6820-");
	break;
	case SOC_88F6828_ID:
	puts("MV88F6828-");
	break;
	default:
	puts("Unknown-");
	break;
	}

	if (mvebu_soc_family() == MVEBU_SOC_AXP) {
	switch (revid) {
	case 1:
	puts("A0");
	break;
	case 2:
	puts("B0");
	break;
	default:
	printf("?? (%x)", revid);
	break;
	}
	}

	if (mvebu_soc_family() == MVEBU_SOC_A38X) {
	switch (revid) {
	case MV_88F68XX_Z1_ID:
	puts("Z1");
	break;
	case MV_88F68XX_A0_ID:
	puts("A0");
	break;
	default:
	printf("?? (%x)", revid);
	break;
	}
	}

	get_sar_freq(&sar_freq);
	printf(" at %d MHz\n", sar_freq.p_clk);

	return 0;
	}
	#endif /* CONFIG_DISPLAY_CPUINFO */

	/*
	* This function initialize Controller DRAM Fastpath windows.
	* It takes the CS size information from the 0x1500 scratch registers
	* and sets the correct windows sizes and base addresses accordingly.
	*
	* These values are set in the scratch registers by the Marvell
	* DDR3 training code, which is executed by the BootROM before the
	* main payload (U-Boot) is executed. This training code is currently
	* only available in the Marvell U-Boot version. It needs to be
	* ported to mainline U-Boot SPL at some point.
	*/
	static void update_sdram_window_sizes(void)
	{
	u64 base = 0;
	u32 size, temp;
	int i;

	for (i = 0; i < SDRAM_MAX_CS; i++) {
	size = readl((MVEBU_SDRAM_SCRATCH + (i * 8))) & SDRAM_ADDR_MASK;
	if (size != 0) {
	size \|= ~(SDRAM_ADDR_MASK);

	/* Set Base Address */
	temp = (base & 0xFF000000ll) \| ((base >> 32) & 0xF);
	writel(temp, MVEBU_SDRAM_BASE + DDR_BASE_CS_OFF(i));

	/*
	* Check if out of max window size and resize
	* the window
	*/
	temp = (readl(MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i)) &
	~(SDRAM_ADDR_MASK)) \| 1;
	temp \|= (size & SDRAM_ADDR_MASK);
	writel(temp, MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i));

	base += ((u64)size + 1);
	} else {
	/*
	* Disable window if not used, otherwise this
	* leads to overlapping enabled windows with
	* pretty strange results
	*/
	clrbits_le32(MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i), 1);
	}
	}
	}

	void mmu_disable(void)
	{
	asm volatile(
	"mrc p15, 0, r0, c1, c0, 0\n"
	"bic r0, #1\n"
	"mcr p15, 0, r0, c1, c0, 0\n");
	}

	#ifdef CONFIG_ARCH_CPU_INIT
	static void set_cbar(u32 addr)
	{
	asm("mcr p15, 4, %0, c15, c0" : : "r" (addr));
	}

	#define MV_USB_PHY_BASE (MVEBU_AXP_USB_BASE + 0x800)
	#define MV_USB_PHY_PLL_REG(reg) (MV_USB_PHY_BASE \| (((reg) & 0xF) << 2))
	#define MV_USB_X3_BASE(addr) (MVEBU_AXP_USB_BASE \| BIT(11) \| \
	(((addr) & 0xF) << 6))
	#define MV_USB_X3_PHY_CHANNEL(dev, reg) (MV_USB_X3_BASE((dev) + 1) \| \
	(((reg) & 0xF) << 2))

	static void setup_usb_phys(void)
	{
	int dev;

	/*
	* USB PLL init
	*/

	/* Setup PLL frequency */
	/* USB REF frequency = 25 MHz */
	clrsetbits_le32(MV_USB_PHY_PLL_REG(1), 0x3ff, 0x605);

	/* Power up PLL and PHY channel */
	setbits_le32(MV_USB_PHY_PLL_REG(2), BIT(9));

	/* Assert VCOCAL_START */
	setbits_le32(MV_USB_PHY_PLL_REG(1), BIT(21));

	mdelay(1);

	/*
	* USB PHY init (change from defaults) specific for 40nm (78X30 78X60)
	*/

	for (dev = 0; dev < 3; dev++) {
	setbits_le32(MV_USB_X3_PHY_CHANNEL(dev, 3), BIT(15));

	/* Assert REG_RCAL_START in channel REG 1 */
	setbits_le32(MV_USB_X3_PHY_CHANNEL(dev, 1), BIT(12));
	udelay(40);
	clrbits_le32(MV_USB_X3_PHY_CHANNEL(dev, 1), BIT(12));
	}
	}

	/*
	* This function is not called from the SPL U-Boot version
	*/
	int arch_cpu_init(void)
	{
	struct pl310_regs *const pl310 =
	(struct pl310_regs *)CONFIG_SYS_PL310_BASE;

	/*
	* Only with disabled MMU its possible to switch the base
	* register address on Armada 38x. Without this the SDRAM
	* located at >= 0x4000.0000 is also not accessible, as its
	* still locked to cache.
	*/
	mmu_disable();

	/* Linux expects the internal registers to be at 0xf1000000 */
	writel(SOC_REGS_PHY_BASE, INTREG_BASE_ADDR_REG);
	set_cbar(SOC_REGS_PHY_BASE + 0xC000);

	/*
	* From this stage on, the SoC detection is working. As we have
	* configured the internal register base to the value used
	* in the macros / defines in the U-Boot header (soc.h).
	*/

	if (mvebu_soc_family() == MVEBU_SOC_A38X) {
	/*
	* To fully release / unlock this area from cache, we need
	* to flush all caches and disable the L2 cache.
	*/
	icache_disable();
	dcache_disable();
	clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
	}

	/*
	* We need to call mvebu_mbus_probe() before calling
	* update_sdram_window_sizes() as it disables all previously
	* configured mbus windows and then configures them as
	* required for U-Boot. Calling update_sdram_window_sizes()
	* without this configuration will not work, as the internal
	* registers can't be accessed reliably because of potenial
	* double mapping.
	* After updating the SDRAM access windows we need to call
	* mvebu_mbus_probe() again, as this now correctly configures
	* the SDRAM areas that are later used by the MVEBU drivers
	* (e.g. USB, NETA).
	*/

	/*
	* First disable all windows
	*/
	mvebu_mbus_probe(NULL, 0);

	if (mvebu_soc_family() == MVEBU_SOC_AXP) {
	/*
	* Now the SDRAM access windows can be reconfigured using
	* the information in the SDRAM scratch pad registers
	*/
	update_sdram_window_sizes();
	}

	/*
	* Finally the mbus windows can be configured with the
	* updated SDRAM sizes
	*/
	mvebu_mbus_probe(windows, ARRAY_SIZE(windows));

	if (mvebu_soc_family() == MVEBU_SOC_AXP) {
	/* Enable GBE0, GBE1, LCD and NFC PUP */
	clrsetbits_le32(ARMADA_XP_PUP_ENABLE, 0,
	GE0_PUP_EN \| GE1_PUP_EN \| LCD_PUP_EN \|
	NAND_PUP_EN \| SPI_PUP_EN);

	/* Configure USB PLL and PHYs on AXP */
	setup_usb_phys();
	}

	/* Enable NAND and NAND arbiter */
	clrsetbits_le32(MVEBU_SOC_DEV_MUX_REG, 0, NAND_EN \| NAND_ARBITER_EN);

	/* Disable MBUS error propagation */
	clrsetbits_le32(SOC_COHERENCY_FABRIC_CTRL_REG, MBUS_ERR_PROP_EN, 0);

	return 0;
	}
	#endif /* CONFIG_ARCH_CPU_INIT */

	u32 mvebu_get_nand_clock(void)
	{
	return CONFIG_SYS_MVEBU_PLL_CLOCK /
	((readl(MVEBU_CORE_DIV_CLK_CTRL(1)) &
	NAND_ECC_DIVCKL_RATIO_MASK) >> NAND_ECC_DIVCKL_RATIO_OFFS);
	}

	/*
	* SOC specific misc init
	*/
	#if defined(CONFIG_ARCH_MISC_INIT)
	int arch_misc_init(void)
	{
	/* Nothing yet, perhaps we need something here later */
	return 0;
	}
	#endif /* CONFIG_ARCH_MISC_INIT */

	#ifdef CONFIG_MV_SDHCI
	int board_mmc_init(bd_t *bis)
	{
	mv_sdh_init(MVEBU_SDIO_BASE, 0, 0,
	SDHCI_QUIRK_32BIT_DMA_ADDR \| SDHCI_QUIRK_WAIT_SEND_CMD);

	return 0;
	}
	#endif

	#ifdef CONFIG_SCSI_AHCI_PLAT
	#define AHCI_VENDOR_SPECIFIC_0_ADDR 0xa0
	#define AHCI_VENDOR_SPECIFIC_0_DATA 0xa4

	#define AHCI_WINDOW_CTRL(win) (0x60 + ((win) << 4))
	#define AHCI_WINDOW_BASE(win) (0x64 + ((win) << 4))
	#define AHCI_WINDOW_SIZE(win) (0x68 + ((win) << 4))

	static void ahci_mvebu_mbus_config(void __iomem *base)
	{
	const struct mbus_dram_target_info *dram;
	int i;

	dram = mvebu_mbus_dram_info();

	for (i = 0; i < 4; i++) {
	writel(0, base + AHCI_WINDOW_CTRL(i));
	writel(0, base + AHCI_WINDOW_BASE(i));
	writel(0, base + AHCI_WINDOW_SIZE(i));
	}

	for (i = 0; i < dram->num_cs; i++) {
	const struct mbus_dram_window *cs = dram->cs + i;

	writel((cs->mbus_attr << 8) \|
	(dram->mbus_dram_target_id << 4) \| 1,
	base + AHCI_WINDOW_CTRL(i));
	writel(cs->base >> 16, base + AHCI_WINDOW_BASE(i));
	writel(((cs->size - 1) & 0xffff0000),
	base + AHCI_WINDOW_SIZE(i));
	}
	}

	static void ahci_mvebu_regret_option(void __iomem *base)
	{
	/*
	* Enable the regret bit to allow the SATA unit to regret a
	* request that didn't receive an acknowlegde and avoid a
	* deadlock
	*/
	writel(0x4, base + AHCI_VENDOR_SPECIFIC_0_ADDR);
	writel(0x80, base + AHCI_VENDOR_SPECIFIC_0_DATA);
	}

	void scsi_init(void)
	{
	printf("MVEBU SATA INIT\n");
	ahci_mvebu_mbus_config((void __iomem *)MVEBU_SATA0_BASE);
	ahci_mvebu_regret_option((void __iomem *)MVEBU_SATA0_BASE);
	ahci_init((void __iomem *)MVEBU_SATA0_BASE);
	}
	#endif

	void enable_caches(void)
	{
	/* Avoid problem with e.g. neta ethernet driver */
	invalidate_dcache_all();

	/* Enable D-cache. I-cache is already enabled in start.S */
	dcache_enable();
	}

	void v7_outer_cache_enable(void)
	{
	if (mvebu_soc_family() == MVEBU_SOC_AXP) {
	struct pl310_regs *const pl310 =
	(struct pl310_regs *)CONFIG_SYS_PL310_BASE;
	u32 u;

	/* The L2 cache is already disabled at this point */

	/*
	* For Aurora cache in no outer mode, enable via the CP15
	* coprocessor broadcasting of cache commands to L2.
	*/
	asm volatile("mrc p15, 1, %0, c15, c2, 0" : "=r" (u));
	u \|= BIT(8); /* Set the FW bit */
	asm volatile("mcr p15, 1, %0, c15, c2, 0" : : "r" (u));

	isb();

	/* Enable the L2 cache */
	setbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
	}
	}

	void v7_outer_cache_disable(void)
	{
	struct pl310_regs *const pl310 =
	(struct pl310_regs *)CONFIG_SYS_PL310_BASE;

	clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
	}