path: root/uart-loader/board/omap3430labrador/omap3430labrador.c

/*
 * (C) Copyright 2006-2009
 * Texas Instruments, <www.ti.com>
 * Jian Zhang <jzhang@ti.com>
 * Richard Woodruff <r-woodruff2@ti.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., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */
#include <common.h>
#include <asm/arch/cpu.h>
#include <asm/arch/bits.h>
#include <asm/arch/mux.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/sys_info.h>
#include <asm/arch/rev.h>
#include <asm/arch/clocks.h>
#include <asm/arch/mem.h>

/* Used to index into DPLL parameter tables */
struct dpll_param {
        unsigned int m;
        unsigned int n;
        unsigned int fsel;
        unsigned int m2;
};

#ifdef CONFIG_OMAP36XX
struct dpll_per_param {
	unsigned int sys_clk;
	unsigned int m;
	unsigned int n;
	unsigned int clkin;
	unsigned int sd;
	unsigned int dco;
	unsigned int m2;
	unsigned int m3;
	unsigned int m4;
	unsigned int m5;
	unsigned int m6;
	unsigned int m2div;
};
typedef struct dpll_per_param dpll_per_param;
#define MAX_SIL_INDEX	1
#else
typedef struct dpll_param dpll_per_param;
#define MAX_SIL_INDEX	3
#endif

typedef struct dpll_param dpll_param;

/* Following functions are exported from lowlevel_init.S */
extern dpll_param * get_mpu_dpll_param(void);
extern dpll_param * get_core_dpll_param(void);
extern dpll_param * get_per_dpll_param(void);

#define __raw_readl(a)    (*(volatile unsigned int *)(a))
#define __raw_writel(v,a) (*(volatile unsigned int *)(a) = (v))
#define __raw_readw(a)    (*(volatile unsigned short *)(a))
#define __raw_writew(v,a) (*(volatile unsigned short *)(a) = (v))

/*******************************************************
 * Routine: delay
 * Description: spinning delay to use before udelay works
 ******************************************************/
static inline void delay(unsigned long loops)
{
	__asm__ volatile ("1:\n" "subs %0, %1, #1\n"
			  "bne 1b":"=r" (loops):"0"(loops));
}

/*****************************************
 * Routine: board_init
 * Description: Early hardware init.
 *****************************************/
int board_init (void)
{
	return 0;
}

/*************************************************************
 *  get_device_type(): tell if GP/HS/EMU/TST
 *************************************************************/
u32 get_device_type(void)
{
        int mode;
        mode = __raw_readl(CONTROL_STATUS) & (DEVICE_MASK);
        return(mode >>= 8);
}

/*****************************************************************
 * sr32 - clear & set a value in a bit range for a 32 bit address
 *****************************************************************/
void sr32(u32 addr, u32 start_bit, u32 num_bits, u32 value)
{
	u32 tmp, msk = 0;
	msk = 1 << num_bits;
	--msk;
	tmp = __raw_readl(addr) & ~(msk << start_bit);
	tmp |=  value << start_bit;
	__raw_writel(tmp, addr);
}

/*********************************************************************
 * wait_on_value() - common routine to allow waiting for changes in
 *   volatile regs.
 *********************************************************************/
u32 wait_on_value(u32 read_bit_mask, u32 match_value, u32 read_addr, u32 bound)
{
	u32 i = 0, val;
	do {
		++i;
		val = __raw_readl(read_addr) & read_bit_mask;
		if (val == match_value)
			return (1);
		if (i == bound)
			return (0);
	} while (1);
}

#ifdef CFG_3430SDRAM_DDR
/*********************************************************************
 * config_3430sdram_ddr() - Init DDR on 3430SDP dev board.
 *********************************************************************/
void config_3430sdram_ddr(void)
{
	/* check if its h/w or s/w reset for warm reset workaround */
	if (__raw_readl(PRM_RSTTST) & 0x2) {
		/* Enable SDRC clock & wait SDRC idle status to access*/
		sr32(CM_ICLKEN1_CORE, 1, 1, 0x1);
		wait_on_value(BIT1, 0, CM_IDLEST1_CORE, LDELAY);
	} else {
		/* do a SDRC reset between types to clear regs */
		__raw_writel(SOFTRESET, SDRC_SYSCONFIG);/* reset sdrc */
		/* wait on reset */
		wait_on_value(BIT0, BIT0, SDRC_STATUS, 12000000);
		__raw_writel(0, SDRC_SYSCONFIG);/* clear soft reset */
	}
	/* Clear reset sources */
	__raw_writel(0xfff, PRM_RSTTST);

	/* setup sdrc to ball mux */
	__raw_writel(SDP_SDRC_SHARING, SDRC_SHARING);

	/* Configure the first chip select */
	/* set mdcfg */
	__raw_writel(SDP_SDRC_MDCFG_0_DDR, SDRC_MCFG_0);

	/* set timing */
	__raw_writel(SDP_SDRC_ACTIM_CTRLA_0, SDRC_ACTIM_CTRLA_0);
	__raw_writel(SDP_SDRC_ACTIM_CTRLB_0, SDRC_ACTIM_CTRLB_0);
	__raw_writel(SDP_SDRC_RFR_CTRL, SDRC_RFR_CTRL_0);

	/* init sequence for mDDR/mSDR using manual commands (DDR is different) */
	__raw_writel(CMD_NOP, SDRC_MANUAL_0);
	delay(5000);
	__raw_writel(CMD_PRECHARGE, SDRC_MANUAL_0);
	__raw_writel(CMD_AUTOREFRESH, SDRC_MANUAL_0);
	__raw_writel(CMD_AUTOREFRESH, SDRC_MANUAL_0);

	/* set mr0 */
	__raw_writel(SDP_SDRC_MR_0_DDR, SDRC_MR_0);
#ifdef CONFIG_2GBDDR
	__raw_writel(SDP_SDRC_MDCFG_0_DDR, SDRC_MCFG_1);

	/* set timing */
	__raw_writel(SDP_SDRC_ACTIM_CTRLA_0, SDRC_ACTIM_CTRLA_1);
	__raw_writel(SDP_SDRC_ACTIM_CTRLB_0, SDRC_ACTIM_CTRLB_1);
	__raw_writel(SDP_SDRC_RFR_CTRL, SDRC_RFR_CTRL_1);

	/* init sequence for mDDR/mSDR using manual commands (DDR is different) */
	__raw_writel(CMD_NOP, SDRC_MANUAL_1);
	delay(5000);
	__raw_writel(CMD_PRECHARGE, SDRC_MANUAL_1);
	__raw_writel(CMD_AUTOREFRESH, SDRC_MANUAL_1);
	__raw_writel(CMD_AUTOREFRESH, SDRC_MANUAL_1);

	/* set mr0 */
	__raw_writel(SDP_SDRC_MR_0_DDR, SDRC_MR_1);

	/* Configure cs1 to be just behind cs0 - 128meg boundary */
#if defined(CONFIG_3430ZOOM2_512M) || \
		defined(CONFIG_3630ZOOM3) || defined(CONFIG_3630SDP)
	/* 2 * 128M = 256M for cs1 */
	__raw_writel(0x2, SDRC_CS_CFG);
#elif defined(CONFIG_3630SDP_1G) || defined(CONFIG_3630ZOOM3_1G)
	/* 4 * 128M = 512M for cs1 */
	__raw_writel(0x4, SDRC_CS_CFG);
#else
	/* 1 * 128M = 128M for cs1 */
	__raw_writel(0x1, SDRC_CS_CFG);
#endif

	/* set up dllB-CS1 */
	__raw_writel(SDP_SDRC_DLLAB_CTRL, SDRC_DLLB_CTRL);
	delay(0x2000);	/* give time to lock */
#endif

	/* set up dllA-CS0 */
	__raw_writel(SDP_SDRC_DLLAB_CTRL, SDRC_DLLA_CTRL);
	delay(0x2000);	/* give time to lock */

}
#endif // CFG_3430SDRAM_DDR

/*************************************************************
 * get_sys_clk_speed - determine reference oscillator speed
 *  based on known 32kHz clock and gptimer.
 *************************************************************/
u32 get_osc_clk_speed(void)
{
	u32 start, cstart, cend, cdiff, val;

	val = __raw_readl(PRM_CLKSRC_CTRL);
	/* If SYS_CLK is being divided by 2, remove for now */
	val = (val & (~BIT7)) | BIT6;
	__raw_writel(val, PRM_CLKSRC_CTRL);

	/* enable timer2 */
	val = __raw_readl(CM_CLKSEL_WKUP) | BIT0;
	__raw_writel(val, CM_CLKSEL_WKUP);	/* select sys_clk for GPT1 */

	/* Enable I and F Clocks for GPT1 */
	val = __raw_readl(CM_ICLKEN_WKUP) | BIT0 | BIT2;
	__raw_writel(val, CM_ICLKEN_WKUP);
	val = __raw_readl(CM_FCLKEN_WKUP) | BIT0;
	__raw_writel(val, CM_FCLKEN_WKUP);

	__raw_writel(0, OMAP34XX_GPT1 + TLDR);	/* start counting at 0 */
	__raw_writel(GPT_EN, OMAP34XX_GPT1 + TCLR);     /* enable clock */
	/* enable 32kHz source *//* enabled out of reset */
	/* determine sys_clk via gauging */

	start = 20 + __raw_readl(S32K_CR);	/* start time in 20 cycles */
	while (__raw_readl(S32K_CR) < start);	/* dead loop till start time */
	cstart = __raw_readl(OMAP34XX_GPT1 + TCRR);	/* get start sys_clk count */
	while (__raw_readl(S32K_CR) < (start + 20));	/* wait for 40 cycles */
	cend = __raw_readl(OMAP34XX_GPT1 + TCRR);	/* get end sys_clk count */
	cdiff = cend - cstart;				/* get elapsed ticks */

	/* based on number of ticks assign speed */
	if (cdiff > 19000)
		return (S38_4M);
	else if (cdiff > 15200)
		return (S26M);
	else if (cdiff > 13000)
		return (S24M);
	else if (cdiff > 9000)
		return (S19_2M);
	else if (cdiff > 7600)
		return (S13M);
	else
		return (S12M);
}

/******************************************************************************
 * get_sys_clkin_sel() - returns the sys_clkin_sel field value based on 
 *   -- input oscillator clock frequency.
 *   
 *****************************************************************************/
void get_sys_clkin_sel(u32 osc_clk, u32 *sys_clkin_sel)
{
	if(osc_clk == S38_4M)
		*sys_clkin_sel=  4;
	else if(osc_clk == S26M)
		*sys_clkin_sel = 3;
	else if(osc_clk == S19_2M)
		*sys_clkin_sel = 2;
	else if(osc_clk == S13M)
		*sys_clkin_sel = 1;
	else if(osc_clk == S12M)
		*sys_clkin_sel = 0;
}

static dpll_per_param *_get_per_dpll(int clk_index)
{
	dpll_per_param *ret = (dpll_per_param *)get_per_dpll_param();
	ret += clk_index;
	return ret;
}

static dpll_param *_get_mpu_dpll(int clk_index, int sil_index)
{
	dpll_param *ret = (dpll_param *)get_mpu_dpll_param();
	ret += (MAX_SIL_INDEX * clk_index) + sil_index;
	return ret;
}

#ifdef CONFIG_OMAP36XX

#define PER_M_BITS 12
#define PER_M2_BITS 5
#define PER_M3_BITS 6
#define PER_M4_BITS 6
#define PER_M5_BITS 6
#define PER_M6_BITS 6

static void per_dpll_init_36XX(int clk_index)
{
	dpll_per_param *per;

	per = _get_per_dpll(clk_index);

	sr32(CM_CLKEN_PLL, 16, 3, PLL_STOP);
	wait_on_value(BIT1, 0, CM_IDLEST_CKGEN, LDELAY);

	sr32(CM_CLKSEL2_PLL,  8, PER_M_BITS, per->m);
	sr32(CM_CLKSEL2_PLL,  0, 7, per->n);
	sr32(PRM_CLKSRC_CTRL, 8, 1, per->clkin);
	sr32(CM_CLKSEL2_PLL, 24, 7, per->sd);
	sr32(CM_CLKSEL2_PLL, 21, 3, per->dco);
	sr32(CM_CLKSEL3_PLL,  0, PER_M2_BITS, per->m2);
	sr32(CM_CLKSEL_DSS,   8, PER_M3_BITS, per->m3);
	sr32(CM_CLKSEL_DSS,   0, PER_M4_BITS, per->m4);
	sr32(CM_CLKSEL_CAM,   0, PER_M5_BITS, per->m5);
	sr32(CM_CLKSEL1_EMU, 24, PER_M6_BITS, per->m6);
	sr32(CM_CLKSEL_CORE, 12, 2, per->m2div);

	sr32(CM_CLKEN_PLL, 16, 3, PLL_LOCK);	/* lock mode */
	wait_on_value(BIT1, 2, CM_IDLEST_CKGEN, LDELAY);
}

static void mpu_dpll_init_36XX(int clk_index, int sil_index)
{
	dpll_param *mpu;

	mpu = _get_mpu_dpll(clk_index, sil_index);

	/* MPU DPLL (unlocked already) */
	sr32(CM_CLKSEL1_PLL_MPU, 8, 11, mpu->m);
	sr32(CM_CLKSEL1_PLL_MPU, 0,  7, mpu->n);
	sr32(CM_CLKSEL2_PLL_MPU, 0,  5, mpu->m2);

	sr32(CM_CLKEN_PLL_MPU, 0, 3, PLL_LOCK); /* lock mode */
	wait_on_value(BIT0, 1, CM_IDLEST_PLL_MPU, LDELAY);
}

#else /* 34xx */

#define PER_M_BITS 11
#define PER_M2_BITS 5
#define PER_M3_BITS 5
#define PER_M4_BITS 5
#define PER_M5_BITS 5
#define PER_M6_BITS 5

static void per_dpll_init_34XX(int clk_index)
{
	dpll_per_param *dpll_param_p;

	/* Getting the base address to PER  DPLL param table*/
	dpll_param_p = (dpll_param *)get_per_dpll_param();
	/* Moving it to the right sysclk base */
	dpll_param_p = dpll_param_p + clk_index;
	/* PER DPLL */
	sr32(CM_CLKEN_PLL, 16, 3, PLL_STOP);
	wait_on_value(BIT1, 0, CM_IDLEST_CKGEN, LDELAY);
	sr32(CM_CLKSEL1_EMU, 24, 5, PER_M6X2);	/* set M6 */
	sr32(CM_CLKSEL_CAM, 0, 5, PER_M5X2);	/* set M5 */
	sr32(CM_CLKSEL_DSS, 0, 5, PER_M4X2);	/* set M4 */
	sr32(CM_CLKSEL_DSS, 8, 5, PER_M3X2);	/* set M3 */
	sr32(CM_CLKSEL3_PLL, 0, 5, dpll_param_p->m2);	/* set M2 */
	sr32(CM_CLKSEL2_PLL, 8, 11, dpll_param_p->m);	/* set m */
	sr32(CM_CLKSEL2_PLL, 0, 7, dpll_param_p->n);	/* set n */
	sr32(CM_CLKEN_PLL, 20, 4, dpll_param_p->fsel);/* FREQSEL */
	sr32(CM_CLKEN_PLL, 16, 3, PLL_LOCK);	/* lock mode */
	wait_on_value(BIT1, 2, CM_IDLEST_CKGEN, LDELAY);
}

static void mpu_dpll_init_34XX(int clk_index, int sil_index)
{
	dpll_param *dpll_param_p;

	/* Getting the base address to MPU DPLL param table*/
	dpll_param_p = (dpll_param *)get_mpu_dpll_param();
	/* Moving it to the right sysclk and ES rev base */
	dpll_param_p = dpll_param_p + MAX_SIL_INDEX*clk_index + sil_index;
	/* MPU DPLL (unlocked already) */
	sr32(CM_CLKSEL2_PLL_MPU, 0, 5, dpll_param_p->m2);	/* Set M2 */
	sr32(CM_CLKSEL1_PLL_MPU, 8, 11, dpll_param_p->m);	/* Set M */
	sr32(CM_CLKSEL1_PLL_MPU, 0, 7, dpll_param_p->n);	/* Set N */
	sr32(CM_CLKEN_PLL_MPU, 4, 4, dpll_param_p->fsel);	/* FREQSEL */
	sr32(CM_CLKEN_PLL_MPU, 0, 3, PLL_LOCK); /* lock mode */
	wait_on_value(BIT0, 1, CM_IDLEST_PLL_MPU, LDELAY);
}

#endif

/******************************************************************************
 * prcm_init() - inits clocks for PRCM as defined in clocks.h
 *   -- called from SRAM, or Flash (using temp SRAM stack).
 *****************************************************************************/
void prcm_init(void)
{
	u32 osc_clk=0, sys_clkin_sel;
	dpll_param *dpll_param_p;
	u32 clk_index, sil_index;

	/* Gauge the input clock speed and find out the sys_clkin_sel
	 * value corresponding to the input clock.
	 */
	osc_clk = get_osc_clk_speed();
	get_sys_clkin_sel(osc_clk, &sys_clkin_sel);

	sr32(PRM_CLKSEL, 0, 3, sys_clkin_sel); /* set input crystal speed */

/* Using 26MHz divider straight into OMAP saves ~2ms on OFF mode restore */
#if 0
	/* If the input clock is greater than 19.2M always divide/2 */
	if(sys_clkin_sel > 2) {
		sr32(PRM_CLKSRC_CTRL, 6, 2, 2);/* input clock divider */
		clk_index = sys_clkin_sel/2;
	} else
#endif
	{
		sr32(PRM_CLKSRC_CTRL, 6, 2, 1);/* input clock divider */
		clk_index = sys_clkin_sel;
	}

	sr32(PRM_CLKSRC_CTRL, 0, 2, 0);/* Bypass mode: T2 inputs a square clock */

	/* The DPLL tables are defined according to sysclk value and
	 * silicon revision. The clk_index value will be used to get
	 * the values for that input sysclk from the DPLL param table
	 * and sil_index will get the values for that SysClk for the 
	 * appropriate silicon rev. 
	 */
#ifdef CONFIG_OMAP36XX
	sil_index = 0;
#else
	if(cpu_is_3410())
		sil_index = 2;
	else {
		if(get_cpu_rev() == CPU_3XX_ES10)
			sil_index = 0;
		else if(get_cpu_rev() >= CPU_3XX_ES20)
			sil_index = 1;
	}	
#endif

	/* Unlock MPU DPLL (slows things down, and needed later) */
	sr32(CM_CLKEN_PLL_MPU, 0, 3, PLL_LOW_POWER_BYPASS);
	wait_on_value(BIT0, 0, CM_IDLEST_PLL_MPU, LDELAY);

	/* Getting the base address of Core DPLL param table*/
	dpll_param_p = (dpll_param *)get_core_dpll_param();
	/* Moving it to the right sysclk and ES rev base */
	dpll_param_p = dpll_param_p + MAX_SIL_INDEX*clk_index + sil_index;
	/* CORE DPLL */
	/* sr32(CM_CLKSEL2_EMU) set override to work when asleep */
	sr32(CM_CLKEN_PLL, 0, 3, PLL_FAST_RELOCK_BYPASS);
	wait_on_value(BIT0, 0, CM_IDLEST_CKGEN, LDELAY);
		/* For 3430 ES1.0 Errata 1.50, default value directly doesnt
		   work. write another value and then default value. */
	sr32(CM_CLKSEL1_EMU, 16, 5, CORE_M3X2 + 1);	/* m3x2 */
	sr32(CM_CLKSEL1_EMU, 16, 5, CORE_M3X2);		/* m3x2 */
	sr32(CM_CLKSEL1_PLL, 27, 2, dpll_param_p->m2);	/* Set M2 */
	sr32(CM_CLKSEL1_PLL, 16, 11, dpll_param_p->m);	/* Set M */
	sr32(CM_CLKSEL1_PLL, 8, 7, dpll_param_p->n);	/* Set N */
	sr32(CM_CLKSEL1_PLL, 6, 1, 0);			/* 96M Src */
	sr32(CM_CLKSEL_CORE, 8, 4, CORE_SSI_DIV);	/* ssi */
	sr32(CM_CLKSEL_CORE, 4, 2, CORE_FUSB_DIV);	/* fsusb ES1 only */
	sr32(CM_CLKSEL_CORE, 2, 2, CORE_L4_DIV);	/* l4 */
	sr32(CM_CLKSEL_CORE, 0, 2, CORE_L3_DIV);	/* l3 */
	sr32(CM_CLKSEL_GFX, 0, 3, GFX_DIV);		/* gfx */
	sr32(CM_CLKSEL_WKUP, 1, 2, WKUP_RSM);		/* reset mgr */
	sr32(CM_CLKEN_PLL, 4, 4, dpll_param_p->fsel);	/* FREQSEL */
	sr32(CM_CLKEN_PLL, 0, 3, PLL_LOCK);		/* lock mode */
	wait_on_value(BIT0, 1, CM_IDLEST_CKGEN, LDELAY);

	/* PER DPLL */
#ifdef CONFIG_OMAP36XX
	per_dpll_init_36XX(clk_index);
	mpu_dpll_init_36XX(clk_index, sil_index);
#else
	per_dpll_init_34XX(clk_index);
	mpu_dpll_init_34XX(clk_index, sil_index);
#endif

	/* Set up GPTimers to sys_clk source only */
 	sr32(CM_CLKSEL_PER, 0, 8, 0xff);
	sr32(CM_CLKSEL_WKUP, 0, 1, 1);

	delay(5000);
}

/*****************************************
 * Routine: secure_unlock
 * Description: Setup security registers for access
 * (GP Device only)
 *****************************************/
void secure_unlock(void)
{
	/* Permission values for registers -Full fledged permissions to all */
	#define UNLOCK_1 0xFFFFFFFF
	#define UNLOCK_2 0x00000000
	#define UNLOCK_3 0x0000FFFF
	/* Protection Module Register Target APE (PM_RT)*/
	__raw_writel(UNLOCK_1, RT_REQ_INFO_PERMISSION_1);
	__raw_writel(UNLOCK_1, RT_READ_PERMISSION_0);
	__raw_writel(UNLOCK_1, RT_WRITE_PERMISSION_0);
	__raw_writel(UNLOCK_2, RT_ADDR_MATCH_1);

	__raw_writel(UNLOCK_3, GPMC_REQ_INFO_PERMISSION_0);
	__raw_writel(UNLOCK_3, GPMC_READ_PERMISSION_0);
	__raw_writel(UNLOCK_3, GPMC_WRITE_PERMISSION_0);

	__raw_writel(UNLOCK_3, OCM_REQ_INFO_PERMISSION_0);
	__raw_writel(UNLOCK_3, OCM_READ_PERMISSION_0);
	__raw_writel(UNLOCK_3, OCM_WRITE_PERMISSION_0);
	__raw_writel(UNLOCK_2, OCM_ADDR_MATCH_2);

	__raw_writel(UNLOCK_1, SMS_RG_ATT0); /* SDRC region 0 public */
}

/**********************************************************
 * Routine: try_unlock_sram()
 * Description: If chip is GP type, unlock the SRAM for
 *  general use.
 ***********************************************************/
void try_unlock_memory(void)
{
	int mode;

	/* if GP device unlock device SRAM for general use */
	/* secure code breaks for Secure/Emulation device - HS/E/T*/
	mode = get_device_type();
	if (mode == GP_DEVICE) {
		secure_unlock();
	}
	return;
}

/**********************************************************
 * Routine: s_init
 * Description: Does early system init of muxing and clocks.
 * - Called at time when only stack is available.
 **********************************************************/

void s_init(void)
{
	watchdog_init();
#ifdef CONFIG_3430_AS_3410
	/* setup the scalability control register for 
	 * 3430 to work in 3410 mode
	 */
	__raw_writel(0x5ABF,CONTROL_SCALABLE_OMAP_OCP);
#endif
	try_unlock_memory();
	set_muxconf_regs();
	delay(100);
	prcm_init();
	per_clocks_enable();
	config_3430sdram_ddr();
}

/*******************************************************
 * Routine: misc_init_r
 * Description: Init ethernet (done here so udelay works)
 ********************************************************/
int misc_init_r (void)
{
	return(0);
}

/******************************************************
 * Routine: wait_for_command_complete
 * Description: Wait for posting to finish on watchdog
 ******************************************************/
void wait_for_command_complete(unsigned int wd_base)
{
	int pending = 1;
	do {
		pending = __raw_readl(wd_base + WWPS);
	} while (pending);
}

/****************************************
 * Routine: watchdog_init
 * Description: Shut down watch dogs
 *****************************************/
void watchdog_init(void)
{
	/* There are 3 watch dogs WD1=Secure, WD2=MPU, WD3=IVA. WD1 is
	 * either taken care of by ROM (HS/EMU) or not accessible (GP).
	 * We need to take care of WD2-MPU or take a PRCM reset.  WD3
	 * should not be running and does not generate a PRCM reset.
	 */
	sr32(CM_FCLKEN_WKUP, 5, 1, 1);
	sr32(CM_ICLKEN_WKUP, 5, 1, 1);
	wait_on_value(BIT5, 0x20, CM_IDLEST_WKUP, 5); /* some issue here */

	__raw_writel(WD_UNLOCK1, WD2_BASE + WSPR);
	wait_for_command_complete(WD2_BASE);
	__raw_writel(WD_UNLOCK2, WD2_BASE + WSPR);
}

/**********************************************
 * Routine: dram_init
 * Description: sets uboots idea of sdram size
 **********************************************/
int dram_init (void)
{
	return 0;
}

/*****************************************************************
 * Routine: peripheral_enable
 * Description: Enable the clks & power for perifs (GPT2, UART1,...)
 ******************************************************************/
void per_clocks_enable(void)
{
	/* Enable GP2 timer. */
	sr32(CM_CLKSEL_PER, 0, 1, 0x1); /* GPT2 = sys clk */
	sr32(CM_ICLKEN_PER, 3, 1, 0x1); /* ICKen GPT2 */
	sr32(CM_FCLKEN_PER, 3, 1, 0x1); /* FCKen GPT2 */

#ifdef CFG_NS16550
////#ifdef CONFIG_SERIAL3
	sr32(CM_FCLKEN_PER, 11, 1, 0x1);
	sr32(CM_ICLKEN_PER, 11, 1, 0x1);
////#else
	/* Enable UART1 clocks */
	sr32(CM_FCLKEN1_CORE, 13, 1, 0x1);
	sr32(CM_ICLKEN1_CORE, 13, 5, 0x1);
////#endif
#endif
	// hns: enable clock for GPIO2-6 http://e2e.ti.com/support/dsp/omap_applications_processors/f/447/p/65520/236545.aspx
	sr32(CM_FCLKEN_PER, 13, 5, 0x1f);
    sr32(CM_ICLKEN_PER, 13, 5, 0x1f);
	// hns: and GPIO1
	sr32(CM_FCLKEN_WKUP, 3, 1, 0x1);
	sr32(CM_ICLKEN_WKUP, 3, 1, 0x1);
	delay(1000);
}

/* Set MUX for UART, GPMC, SDRC, GPIO */

#define 	MUX_VAL(OFFSET,VALUE)\
		__raw_writew((VALUE), OMAP34XX_CTRL_BASE + (OFFSET));

#define		CP(x)	(CONTROL_PADCONF_##x)
/*
 * IEN  - Input Enable
 * IDIS - Input Disable
 * PTD  - Pull type Down
 * PTU  - Pull type Up
 * DIS  - Pull type selection is inactive
 * EN   - Pull type selection is active
 * M0   - Mode 0
 * The commented string gives the final mux configuration for that pin
 */
#define MUX_DEFAULT()\
	/*SDRC*/\
	MUX_VAL(CP(SDRC_D0),        (IEN  | PTD | DIS | M0)) /*SDRC_D0*/\
	MUX_VAL(CP(SDRC_D1),        (IEN  | PTD | DIS | M0)) /*SDRC_D1*/\
	MUX_VAL(CP(SDRC_D2),        (IEN  | PTD | DIS | M0)) /*SDRC_D2*/\
	MUX_VAL(CP(SDRC_D3),        (IEN  | PTD | DIS | M0)) /*SDRC_D3*/\
	MUX_VAL(CP(SDRC_D4),        (IEN  | PTD | DIS | M0)) /*SDRC_D4*/\
	MUX_VAL(CP(SDRC_D5),        (IEN  | PTD | DIS | M0)) /*SDRC_D5*/\
	MUX_VAL(CP(SDRC_D6),        (IEN  | PTD | DIS | M0)) /*SDRC_D6*/\
	MUX_VAL(CP(SDRC_D7),        (IEN  | PTD | DIS | M0)) /*SDRC_D7*/\
	MUX_VAL(CP(SDRC_D8),        (IEN  | PTD | DIS | M0)) /*SDRC_D8*/\
	MUX_VAL(CP(SDRC_D9),        (IEN  | PTD | DIS | M0)) /*SDRC_D9*/\
	MUX_VAL(CP(SDRC_D10),       (IEN  | PTD | DIS | M0)) /*SDRC_D10*/\
	MUX_VAL(CP(SDRC_D11),       (IEN  | PTD | DIS | M0)) /*SDRC_D11*/\
	MUX_VAL(CP(SDRC_D12),       (IEN  | PTD | DIS | M0)) /*SDRC_D12*/\
	MUX_VAL(CP(SDRC_D13),       (IEN  | PTD | DIS | M0)) /*SDRC_D13*/\
	MUX_VAL(CP(SDRC_D14),       (IEN  | PTD | DIS | M0)) /*SDRC_D14*/\
	MUX_VAL(CP(SDRC_D15),       (IEN  | PTD | DIS | M0)) /*SDRC_D15*/\
	MUX_VAL(CP(SDRC_D16),       (IEN  | PTD | DIS | M0)) /*SDRC_D16*/\
	MUX_VAL(CP(SDRC_D17),       (IEN  | PTD | DIS | M0)) /*SDRC_D17*/\
	MUX_VAL(CP(SDRC_D18),       (IEN  | PTD | DIS | M0)) /*SDRC_D18*/\
	MUX_VAL(CP(SDRC_D19),       (IEN  | PTD | DIS | M0)) /*SDRC_D19*/\
	MUX_VAL(CP(SDRC_D20),       (IEN  | PTD | DIS | M0)) /*SDRC_D20*/\
	MUX_VAL(CP(SDRC_D21),       (IEN  | PTD | DIS | M0)) /*SDRC_D21*/\
	MUX_VAL(CP(SDRC_D22),       (IEN  | PTD | DIS | M0)) /*SDRC_D22*/\
	MUX_VAL(CP(SDRC_D23),       (IEN  | PTD | DIS | M0)) /*SDRC_D23*/\
	MUX_VAL(CP(SDRC_D24),       (IEN  | PTD | DIS | M0)) /*SDRC_D24*/\
	MUX_VAL(CP(SDRC_D25),       (IEN  | PTD | DIS | M0)) /*SDRC_D25*/\
	MUX_VAL(CP(SDRC_D26),       (IEN  | PTD | DIS | M0)) /*SDRC_D26*/\
	MUX_VAL(CP(SDRC_D27),       (IEN  | PTD | DIS | M0)) /*SDRC_D27*/\
	MUX_VAL(CP(SDRC_D28),       (IEN  | PTD | DIS | M0)) /*SDRC_D28*/\
	MUX_VAL(CP(SDRC_D29),       (IEN  | PTD | DIS | M0)) /*SDRC_D29*/\
	MUX_VAL(CP(SDRC_D30),       (IEN  | PTD | DIS | M0)) /*SDRC_D30*/\
	MUX_VAL(CP(SDRC_D31),       (IEN  | PTD | DIS | M0)) /*SDRC_D31*/\
	MUX_VAL(CP(SDRC_CLK),       (IEN  | PTD | DIS | M0)) /*SDRC_CLK*/\
	MUX_VAL(CP(SDRC_DQS0),      (IEN  | PTD | DIS | M0)) /*SDRC_DQS0*/\
	MUX_VAL(CP(SDRC_DQS1),      (IEN  | PTD | DIS | M0)) /*SDRC_DQS1*/\
	MUX_VAL(CP(SDRC_DQS2),      (IEN  | PTD | DIS | M0)) /*SDRC_DQS2*/\
	MUX_VAL(CP(SDRC_DQS3),      (IEN  | PTD | DIS | M0)) /*SDRC_DQS3*/\
	/*GPMC*/\
	MUX_VAL(CP(GPMC_A1),        (IDIS | PTD | DIS | M0)) /*GPMC_A1*/\
	MUX_VAL(CP(GPMC_A2),        (IDIS | PTD | DIS | M0)) /*GPMC_A2*/\
	MUX_VAL(CP(GPMC_A3),        (IDIS | PTD | DIS | M0)) /*GPMC_A3*/\
	MUX_VAL(CP(GPMC_A4),        (IDIS | PTD | DIS | M0)) /*GPMC_A4*/\
	MUX_VAL(CP(GPMC_A5),        (IDIS | PTD | DIS | M0)) /*GPMC_A5*/\
	MUX_VAL(CP(GPMC_A6),        (IDIS | PTD | DIS | M0)) /*GPMC_A6*/\
	MUX_VAL(CP(GPMC_A7),        (IDIS | PTD | DIS | M0)) /*GPMC_A7*/\
	MUX_VAL(CP(GPMC_A8),        (IDIS | PTD | DIS | M0)) /*GPMC_A8*/\
	MUX_VAL(CP(GPMC_A9),        (IDIS | PTD | DIS | M0)) /*GPMC_A9*/\
	MUX_VAL(CP(GPMC_A10),       (IDIS | PTD | DIS | M0)) /*GPMC_A10*/\
	MUX_VAL(CP(GPMC_D0),        (IEN  | PTD | DIS | M0)) /*GPMC_D0*/\
	MUX_VAL(CP(GPMC_D1),        (IEN  | PTD | DIS | M0)) /*GPMC_D1*/\
	MUX_VAL(CP(GPMC_D2),        (IEN  | PTD | DIS | M0)) /*GPMC_D2*/\
	MUX_VAL(CP(GPMC_D3),        (IEN  | PTD | DIS | M0)) /*GPMC_D3*/\
	MUX_VAL(CP(GPMC_D4),        (IEN  | PTD | DIS | M0)) /*GPMC_D4*/\
	MUX_VAL(CP(GPMC_D5),        (IEN  | PTD | DIS | M0)) /*GPMC_D5*/\
	MUX_VAL(CP(GPMC_D6),        (IEN  | PTD | DIS | M0)) /*GPMC_D6*/\
	MUX_VAL(CP(GPMC_D7),        (IEN  | PTD | DIS | M0)) /*GPMC_D7*/\
	MUX_VAL(CP(GPMC_D8),        (IEN  | PTD | DIS | M0)) /*GPMC_D8*/\
	MUX_VAL(CP(GPMC_D9),        (IEN  | PTD | DIS | M0)) /*GPMC_D9*/\
	MUX_VAL(CP(GPMC_D10),       (IEN  | PTD | DIS | M0)) /*GPMC_D10*/\
	MUX_VAL(CP(GPMC_D11),       (IEN  | PTD | DIS | M0)) /*GPMC_D11*/\
	MUX_VAL(CP(GPMC_D12),       (IEN  | PTD | DIS | M0)) /*GPMC_D12*/\
	MUX_VAL(CP(GPMC_D13),       (IEN  | PTD | DIS | M0)) /*GPMC_D13*/\
	MUX_VAL(CP(GPMC_D14),       (IEN  | PTD | DIS | M0)) /*GPMC_D14*/\
	MUX_VAL(CP(GPMC_D15),       (IEN  | PTD | DIS | M0)) /*GPMC_D15*/\
	MUX_VAL(CP(GPMC_nCS0),      (IDIS | PTU | EN  | M0)) /*GPMC_nCS0*/\
	MUX_VAL(CP(GPMC_nCS1),      (IDIS | PTU | EN  | M0)) /*GPMC_nCS1*/\
	MUX_VAL(CP(GPMC_nCS2),      (IDIS | PTU | EN  | M0)) /*GPMC_nCS2*/\
	MUX_VAL(CP(GPMC_nCS3),      (IDIS | PTU | EN  | M0)) /*GPMC_nCS3*/\
	MUX_VAL(CP(GPMC_nCS4),      (IDIS | PTU | EN  | M0)) /*GPMC_nCS4 lab*/\
	MUX_VAL(CP(GPMC_nCS5),      (IDIS | PTD | DIS | M0)) /*GPMC_nCS5 lab*/\
MUX_VAL(CP(GPMC_nCS6),      (IEN | PTD | EN  | M4)) /*GPT_PWM11/GPIO57*/\
	MUX_VAL(CP(GPMC_nCS7),      (IEN  | PTU | EN  | M1)) /*GPMC_IO_DIR lab*/\
	MUX_VAL(CP(GPMC_CLK),       (IDIS | PTD | DIS | M0)) /*GPMC_CLK*/\
	MUX_VAL(CP(GPMC_nADV_ALE),  (IDIS | PTD | DIS | M0)) /*GPMC_nADV_ALE*/\
	MUX_VAL(CP(GPMC_nOE),       (IDIS | PTD | DIS | M0)) /*GPMC_nOE*/\
	MUX_VAL(CP(GPMC_nWE),       (IDIS | PTD | DIS | M0)) /*GPMC_nWE*/\
	MUX_VAL(CP(GPMC_nBE0_CLE),  (IDIS | PTD | DIS | M0)) /*GPMC_nBE0_CLE*/\
	MUX_VAL(CP(GPMC_nBE1),      (IEN  | PTD | DIS | M0)) /*GPMC_nBE1 lab*/\
	MUX_VAL(CP(GPMC_nWP),       (IEN  | PTD | DIS | M0)) /*GPMC_nWP*/\
	MUX_VAL(CP(GPMC_WAIT0),     (IEN  | PTU | EN  | M0)) /*GPMC_WAIT0*/\
	MUX_VAL(CP(GPMC_WAIT1),     (IEN  | PTU | EN  | M0)) /*GPMC_WAIT1*/\
	MUX_VAL(CP(GPMC_WAIT2),     (IEN  | PTU | EN  | M0)) /*gpmc_nWait lab*/\
	MUX_VAL(CP(GPMC_WAIT3),     (IEN  | PTU | EN  | M0)) /*gpmc_nWait lab*/\
	MUX_VAL(CP(DSS_DATA18),     (IDIS | PTD | DIS | M0)) /*DSS_DATA18*/\
	MUX_VAL(CP(DSS_DATA19),     (IDIS | PTD | DIS | M0)) /*DSS_DATA19*/\
	MUX_VAL(CP(DSS_DATA20),     (IDIS | PTD | DIS | M0)) /*DSS_DATA20*/\
	MUX_VAL(CP(CAM_XCLKB),      (IDIS | PTD | DIS | M0)) /*CAM_XCLKB*/\
	MUX_VAL(CP(CAM_WEN),        (IEN  | PTD | DIS | M4)) /*GPIO_167*/\
	MUX_VAL(CP(UART1_TX),       (IDIS | PTD | DIS | M0)) /*UART1_TX*/\
	MUX_VAL(CP(UART1_RTS),      (IDIS | PTD | DIS | M0)) /*UART1_RTS*/\
	MUX_VAL(CP(UART1_CTS),      (IEN  | PTU | DIS | M0)) /*UART1_CTS*/\
	MUX_VAL(CP(UART1_RX),       (IEN  | PTD | DIS | M0)) /*UART1_RX*/\
	MUX_VAL(CP(McBSP1_DX),      (IEN  | PTD | DIS | M4)) /*GPIO_158*/\
	MUX_VAL(CP(SYS_32K),        (IEN  | PTD | DIS | M0)) /*SYS_32K*/\
	MUX_VAL(CP(SYS_BOOT0),      (IEN  | PTD | DIS | M4)) /*GPIO_2 */\
	MUX_VAL(CP(SYS_BOOT1),      (IEN  | PTD | DIS | M4)) /*GPIO_3 */\
	MUX_VAL(CP(SYS_BOOT2),      (IEN  | PTD | DIS | M4)) /*GPIO_4 */\
	MUX_VAL(CP(SYS_BOOT3),      (IEN  | PTD | DIS | M4)) /*GPIO_5 */\
	MUX_VAL(CP(SYS_BOOT4),      (IEN  | PTD | DIS | M4)) /*GPIO_6 */\
	MUX_VAL(CP(SYS_BOOT5),      (IEN  | PTD | DIS | M4)) /*GPIO_7 */\
	MUX_VAL(CP(SYS_BOOT6),      (IEN  | PTD | DIS | M4)) /*GPIO_8 */\
	MUX_VAL(CP(SYS_CLKOUT1),    (IDIS | PTD | DIS | M0)) /*sys_clkout2 lab*/\
	MUX_VAL(CP(SYS_CLKOUT2),    (IDIS | PTD | DIS | M0)) /*sys_clkout2 lab*/\
	MUX_VAL(CP(JTAG_nTRST),     (IEN  | PTD | DIS | M0)) /*JTAG_nTRST*/\
	MUX_VAL(CP(JTAG_TCK),       (IEN  | PTD | DIS | M0)) /*JTAG_TCK*/\
	MUX_VAL(CP(JTAG_TMS),       (IEN  | PTD | DIS | M0)) /*JTAG_TMS*/\
	MUX_VAL(CP(JTAG_TDI),       (IEN  | PTD | DIS | M0)) /*JTAG_TDI*/\
	MUX_VAL(CP(JTAG_EMU0),      (IEN  | PTD | DIS | M0)) /*JTAG_EMU0*/\
	MUX_VAL(CP(JTAG_EMU1),      (IEN  | PTD | DIS | M0)) /*JTAG_EMU1*/\
	MUX_VAL(CP(ETK_CLK),        (IEN  | PTD | DIS | M4)) /*GPIO_12*/\
	MUX_VAL(CP(ETK_CTL),        (IEN  | PTD | DIS | M4)) /*GPIO_13*/\
	MUX_VAL(CP(ETK_D0 ),        (IEN  | PTD | DIS | M4)) /*GPIO_14*/\
	MUX_VAL(CP(ETK_D1 ),        (IEN  | PTD | DIS | M4)) /*GPIO_15*/\
	MUX_VAL(CP(ETK_D2 ),        (IEN  | PTD | DIS | M4)) /*GPIO_16*/\
	MUX_VAL(CP(ETK_D10),        (IEN  | PTD | DIS | M4)) /*GPIO_24*/\
	MUX_VAL(CP(ETK_D11),        (IEN  | PTD | DIS | M4)) /*GPIO_25*/\
	MUX_VAL(CP(ETK_D12),        (IEN  | PTD | DIS | M4)) /*GPIO_26*/\
	MUX_VAL(CP(ETK_D13),        (IEN  | PTD | DIS | M4)) /*GPIO_27*/\
	MUX_VAL(CP(ETK_D14),        (IEN  | PTD | DIS | M4)) /*GPIO_28*/\
	MUX_VAL(CP(ETK_D15),        (IEN  | PTD | DIS | M4)) /*GPIO_29*/\
MUX_VAL(CP(UART3_CTS_RCTX), (IEN  | PTD | EN  | M0)) /*UART3_CTS_RCTX */\
MUX_VAL(CP(UART3_RTS_SD),   (IDIS | PTD | DIS | M0)) /*UART3_RTS_SD */\
	MUX_VAL(CP(UART3_RX_IRRX ), (IEN  | PTD | DIS | M0)) /*UART3_RX_IRRX*/\
	MUX_VAL(CP(UART3_TX_IRTX ), (IDIS | PTD | DIS | M0)) /*UART3_TX_IRTX*/\
	MUX_VAL(CP(sdrc_cke0),      (IDIS | PTU | EN  | M0)) /*sdrc_cke0 */\
	MUX_VAL(CP(sdrc_cke1),      (IDIS | PTD | DIS | M7)) /*sdrc_cke1 not used*/
/**********************************************************
 * Routine: set_muxconf_regs
 * Description: Setting up the configuration Mux registers
 *              specific to the hardware. Many pins need
 *              to be moved from protect to primary mode.
 *********************************************************/
void set_muxconf_regs(void)
{
	MUX_DEFAULT();
#ifdef CONFIG_2GBDDR
	MUX_VAL(CP(sdrc_cke1),      (IDIS | PTU | EN  | M0)) /*sdrc_cke1 */
#endif
}

/**********************************************************
 * Routine: nand+_init
 * Description: Set up nand for nand and jffs2 commands
 *********************************************************/
int nand_init(void)
{
	/* global settings */
	__raw_writel(0x10, GPMC_SYSCONFIG);	/* smart idle */
	__raw_writel(0x0, GPMC_IRQENABLE);	/* isr's sources masked */
	__raw_writel(0, GPMC_TIMEOUT_CONTROL);/* timeout disable */
#ifdef CFG_NAND
	__raw_writel(0x001, GPMC_CONFIG);	/* set nWP, disable limited addr */
#endif

	/* setup CS0 for Micron NAND, leave other CS's to u-boot */
	__raw_writel(0 , GPMC_CONFIG7 + GPMC_CONFIG_CS0);
	delay(1000);

#ifdef CFG_NAND
	__raw_writel( M_NAND_GPMC_CONFIG1, GPMC_CONFIG1 + GPMC_CONFIG_CS0);
	__raw_writel( M_NAND_GPMC_CONFIG2, GPMC_CONFIG2 + GPMC_CONFIG_CS0);
	__raw_writel( M_NAND_GPMC_CONFIG3, GPMC_CONFIG3 + GPMC_CONFIG_CS0);
	__raw_writel( M_NAND_GPMC_CONFIG4, GPMC_CONFIG4 + GPMC_CONFIG_CS0);
	__raw_writel( M_NAND_GPMC_CONFIG5, GPMC_CONFIG5 + GPMC_CONFIG_CS0);
	__raw_writel( M_NAND_GPMC_CONFIG6, GPMC_CONFIG6 + GPMC_CONFIG_CS0);

#elif CFG_ONENAND /* CFG_ONENAND */
	__raw_writel( ONENAND_GPMC_CONFIG1, GPMC_CONFIG1 + GPMC_CONFIG_CS0);
	__raw_writel( ONENAND_GPMC_CONFIG2, GPMC_CONFIG2 + GPMC_CONFIG_CS0);
	__raw_writel( ONENAND_GPMC_CONFIG3, GPMC_CONFIG3 + GPMC_CONFIG_CS0);
	__raw_writel( ONENAND_GPMC_CONFIG4, GPMC_CONFIG4 + GPMC_CONFIG_CS0);
	__raw_writel( ONENAND_GPMC_CONFIG5, GPMC_CONFIG5 + GPMC_CONFIG_CS0);
	__raw_writel( ONENAND_GPMC_CONFIG6, GPMC_CONFIG6 + GPMC_CONFIG_CS0);
#endif

	/* Enable the GPMC Mapping */
	__raw_writel(( ((OMAP34XX_GPMC_CS0_SIZE & 0xF)<<8) |
		     ((OMAP34XX_GPMC_CS0_MAP>>24) & 0x3F) |
		     (1<<6) ),  (GPMC_CONFIG7 + GPMC_CONFIG_CS0));
	delay(2000);

#ifdef CFG_NAND
 	if (nand_chip()){
#ifdef CFG_PRINTF
		printf("Unsupported Chip!\n");
#endif
		return 1;
	}
#elif CFG_ONENAND
	if (onenand_chip()){
#ifdef CFG_PRINTF
		printf("OneNAND Unsupported !\n");
#endif
		return 1;
	}
#endif
	return 0;
}

/* optionally do something like blinking LED */
void board_hang (void)
{ 
	while (1) {
		printf("X-Loader hangs\n");
	}
}